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- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | okay , so we start off with red , right ? the red electric field points up , and then this pink wave 's electric field is zero at that point . so this is all i have . | is n't the magnetic field , the vertical component in an electromagnetic wave and the electric field is perpendicular to it ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | well , if i draw an axis over here , and this point here , in the middle , this is this line -- so imagine we 're looking straight down that line -- and then up and down is up and down , and then left and right , that direction i have the magnetic field , would be this way and that way . what would my eye see ? well , ... | so if i put 2 left-eye lenses from the 3d glasses in the same frames , would i see the movie in 2d without it being fuzzy ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you might think , `` okay , why ? `` why even bother with circular polarization ? '' well , i kind of lied earlier . | how do the 3d glasses create a circular polarization filter , and how do they select clockwise vs. counterclockwise ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | it 's often good enough to just know the direction of the electric field when we focus on the electric field . so what does polarization mean ? polarization refers to the fact that , if this light ray was heading straight toward your eye , or a detector , over here , what would you see ? | i ca n't understand the polarization please explain it to me ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | one component points up . that 's this electric field . one component points left . | regarding the e & b field , how the polarizer affect e & b field together ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so we send this in . what would happen ? well , at this point , you 'd have a electric field that points this way . | so if we have up & down polarizer , what will happen with the left & right b field ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you were doing an experiment . you needed polarized light . well , that 's easy . | does polarization affect the energy of the polarized light ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | or you could just rotate this thing and imagine a polarizer that only lets through horizontal light . now it would only let through light that was this way , and so you would only get this part of the light . or you could just orient it at any angle you want and block everything but the certain angle that this polarize... | would this light have less energy than before , and why ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you 're going to receive the ones closes to you first in this light ray going this way . so you 'd actually receive this one first , then that one , then this one , then this one . because of that , you would n't see this going in a counterclockwise way , you 'd see this going in a clockwise circularly polarized way . | why do the glasses that we use to watch 3-d movies have blue color on one side and red on the other if all that one needs to use is a pair of circular polarisers ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you were doing an experiment . you needed polarized light . well , that 's easy . | is all glare polarized light ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so what we do is , instead , we create circular polarized glasses , so that this one would only get one polarization , this one would get the other direction . this way , even if you tilt your head a little bit ... shoot , clockwise is clockwise , counterclockwise is counterclockwise . by using circular polarization fo... | please explain the 3d movie effect where the light moves in clockwise , fine but what about anti-clockwise and both simultaneously ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | well , the reason our eyes see 3d is because they 're spaced a little bit apart . they each get a different , slightly different image . that makes us see in 3d . | we use glasses with different polarization for different purposes..but i did n't get why even use them ( except the 3d movie example ) ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you were doing an experiment . you needed polarized light . well , that 's easy . | velocity of wave is perpendicular to direction of electric field , so they must be always polarized ; i think i still have n't got the concept of polarization , and difference in properties of polarized an d non polarized light , can anyone help ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . | how is a movie made 3-d ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you 're going to receive the ones closes to you first in this light ray going this way . so you 'd actually receive this one first , then that one , then this one , then this one . because of that , you would n't see this going in a counterclockwise way , you 'd see this going in a clockwise circularly polarized way . | do atoms in objects ( like an apple ) emit their own photon when hit by one of the sun 's photons ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so this surface here , once this light reflects , it 's coming in at all orientations . you got electric field ... you never know what electric field you 're going to get straight from the sun . and when it reflects , though , you mostly get , upon reflection , the direction of polarization defined by the plane of the ... | is it like only the things above can get affected by that electric field and the things below can not , or it is positive while it is pointing up ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | because of that , this light ray is polarized . so polarized light is light where the electric field is only oscillating in one direction . up or down , that 's one direction -- vertically . | is the graph representing a real model of light or it just represent the value of the electric field , the magnetic field , and the direction ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | because of that , this light ray is polarized . so polarized light is light where the electric field is only oscillating in one direction . up or down , that 's one direction -- vertically . | do charged particles interact with the electric and magnetic field components of light.if yes then is there any daily life experience related to it ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | and it does . if you take off your 3d glasses and look at a 3d movie , looks terrible , because now both eyes are getting both images . but if you put your glasses back on , now this eye only gets the orientation that it 's supposed to get , and this eye only gets the orientation that it 's supposed to get , and you ge... | are the two overlapping images of a 3d movie different drawn ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | whereas these over here , these are polarized . so how could you polarize this light ? let 's say you wanted light that was polarized . | does the ozone in our atmosphere polarize light ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so we 're going to leave the magnetic fields out . it 's often good enough to just know the direction of the electric field when we focus on the electric field . so what does polarization mean ? polarization refers to the fact that , if this light ray was heading straight toward your eye , or a detector , over here , w... | when he refers to the direction of polarization as `` the direction the electromagnetic field is pointing , '' what does he mean ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you were doing an experiment . you needed polarized light . well , that 's easy . | whice one is easy to see with open eyes , polarized light or unpolarized light ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . | what are the other use of polarization of light in our everyday life except sun-glass ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | and when it reflects , though , you mostly get , upon reflection , the direction of polarization defined by the plane of the surface that it hit . so because the floor is horizontal , when this light ray hits the ground and reflects , that reflected light gets partially polarized . this horizontal component of the elec... | in the example with the sun and the sunglasses , once the light is reflected on the ground , why is is partially polarized and why does the light mostly move in the direction of the surface ( so horizontally ) ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | because of that , this light ray is polarized . so polarized light is light where the electric field is only oscillating in one direction . up or down , that 's one direction -- vertically . | do eyes only detect electric field and not the magnetic component of light ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you were doing an experiment . you needed polarized light . well , that 's easy . | how is the light mostly horizontal ( thus a vertical polarized sun glasses blocking most of the glare ) ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so then it 'd just be at zero . now what happens over here ? well , i 've got light . | in photoelectric effect what happens when only the work function is provided ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | all right , when this point right here gets to your eye , what am i going to see ? well , i 'm going to have a light ray that 's one part of a light ray . one component points up . | when i see a light ray entering my eyes , how do i differentiate between a horizontally and a vertically polarised light ray ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you can get light polarized in any direction , all at once , all overlapping . so if we draw this case for a light bulb , just a random incandescent light bulb , you might get light , some of the light , hitting you eye , you can get some light that 's got that direction , you got light that 's got this direction , you... | if you take only a single light wave , will it be polarised ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | it 's hard , on something two-dimensional , but you can kind of imagine those looking something like this . and those magnetic fields would point at a right angle to the electric fields . but this gets really messy if i try to draw both the electric and magnetic fields at the same time . | why cant we see electric fields that move left to right ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | we can play the same trick on our eye if we have the polarization like this . if light , if some of the light from the movie theater screen is coming in with one polarization , and the other light 's coming in with the other polarization , we can send two different images to our eyes at the same time . if you took thes... | which factor is responsible for polarization of light coming from sky and how ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | or it could be polarized diagonally . but either way , you could have this wave polarized along any direction . i mean , a light ray like this , if we had it coming in diagonal , this light ray that 's oscillating like this , where the electric field oscillates like that , that also polarized . | how can a sound wave in solid medium can be polarized from the source of the sound wave ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so we send this in . what would happen ? well , at this point , you 'd have a electric field that points this way . | what would happen if the circular polarization were to be done with three electrical fields ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so we send this in . what would happen ? well , at this point , you 'd have a electric field that points this way . | or how would the phase shift take place ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you might think , `` okay , why ? `` why even bother with circular polarization ? '' well , i kind of lied earlier . | how would they interact to produce a circular polarization ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you might think , `` okay , why ? `` why even bother with circular polarization ? '' well , i kind of lied earlier . | the circular polarization is not exactly about the orientation , what you said in the video is the another wave moves forward , however the direction is not changing ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you were doing an experiment . you needed polarized light . well , that 's easy . | so the view screen on the enterprise is circularly polarized ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | or it could be polarized diagonally . but either way , you could have this wave polarized along any direction . i mean , a light ray like this , if we had it coming in diagonal , this light ray that 's oscillating like this , where the electric field oscillates like that , that also polarized . these are both polarized... | what will the ray look like for a wave that only goes up ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | and it does . if you take off your 3d glasses and look at a 3d movie , looks terrible , because now both eyes are getting both images . but if you put your glasses back on , now this eye only gets the orientation that it 's supposed to get , and this eye only gets the orientation that it 's supposed to get , and you ge... | for the 3d glasses and the sunglasses question , is that why 3d glasses look like sunglasses ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | it 's hard , on something two-dimensional , but you can kind of imagine those looking something like this . and those magnetic fields would point at a right angle to the electric fields . but this gets really messy if i try to draw both the electric and magnetic fields at the same time . | if electric fields ( of `` point '' charges ) are spherical like gravity fields , and em waves are periodic perturbations of those fields propagated at the speed of light , how does it happen that em waves occur not as radiating wave fronts in space , but along and perpendicular to linear axes ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . | why is the position of hydrogen not with the halogens but with the alkali metals ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you can get light polarized in any direction , all at once , all overlapping . so if we draw this case for a light bulb , just a random incandescent light bulb , you might get light , some of the light , hitting you eye , you can get some light that 's got that direction , you got light that 's got this direction , you... | but how do you make a circular polarised sheet knowing we need another light source which is out of phase w.r.t to incident light wave by ninety degrees ... the plastic polarised sheet is no source for such light ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you might think , `` okay , why ? `` why even bother with circular polarization ? '' well , i kind of lied earlier . | how does one can change the orientation of the circular polarization ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | this light was polarized vertically . so that 's called linear polarization . any time ... | if we were asked to define linear/circular polarization , what would the answer be ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | and it does . if you take off your 3d glasses and look at a 3d movie , looks terrible , because now both eyes are getting both images . but if you put your glasses back on , now this eye only gets the orientation that it 's supposed to get , and this eye only gets the orientation that it 's supposed to get , and you ge... | wait , do n't 3d glasses work because blue\red color gets blocked ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | now let 's say we sent in another light ray , another light ray that also had a polarization , but not in this direction . let 's say our other light ray had polarization in this direction , so it looks like this , kind of like what our magnetic field would have looked like . but this is a completely different light ra... | like , with one eye you see only blue-shaded image , and with other you see only red-shaded image , and since those images are placed the way it looks like the red or the blue ( it works both ways ) image is closer , your brain combines those two images into one that looks just like irl ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | they might have different values , but i 'm only going to see electric fields that point up or down . because of that , this light ray is polarized . so polarized light is light where the electric field is only oscillating in one direction . | if you take a specific photon in an unpolarized light ray , is n't the photon itself polarized ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | maybe not completely . sometimes it could be . it could be completely polarized , but often it 's just partially polarized . | why is that our sky appears white sometimes when we view it in certain directions on hot days ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . | in un-polarised light , do the electric and magnetic waves which are in the same plane undergo constructive superposition ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so this is a polarizer . these are cheap : thin , plastic , configured in a way so that it only lets light through that 's vertically polarized . any light coming in here that 's not vertically polarized gets blocked , or absorbed . | how does the plastic limit it 's polarity ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | why do this ? why send in two different waves to just get diagonally polarized light ? i could have just sent in one wave that was diagonally polarized and got the same thing . | in the last concept , if i send two differently polarized light with phase difference of pi/2 what will i see ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you do n't want to see the glare off of the sun getting to you . so polarized sunglasses are useful . also , we can play a trick on our eye , if we really wanted to . | what 's the difference between polarized sunglasses and regular sunglasses ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | here 's some polarizers . that way , a lot of this glare gets blocked because it does not have a vertical orientation , it has a horizontal orientation . and then we can block it . | why is it vertical but not horizontal ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | sometimes it could be . it could be completely polarized , but often it 's just partially polarized . but that 's pretty cool , because now you know what we can do . | when does it gets partially polarized & when ... fully polarised ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | and this is a material that lets light through , but it only lets light through in one orientation , so you 're going to have a polarizer that , for instance , only lets through vertically polarized light . so this is a polarizer . these are cheap : thin , plastic , configured in a way so that it only lets light throug... | are the materials used for polarizer , itself polarizing , or should it be modified in any way that it gets the property ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . | i thought that when people draw the waves with two waves intersecting each other , that was the quantum superposition of light rays , if thats not quantum superposition then how does it work , does it exists somewhere else or works in another kinda dimention ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | it 's hard , on something two-dimensional , but you can kind of imagine those looking something like this . and those magnetic fields would point at a right angle to the electric fields . but this gets really messy if i try to draw both the electric and magnetic fields at the same time . | so does that mean we can see electric and magnetic fields if we can sense emr ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | all right , when this point right here gets to your eye , what am i going to see ? well , i 'm going to have a light ray that 's one part of a light ray . one component points up . | how can be reflected light ray isolated to a single axis ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | but either way , you could have this wave polarized along any direction . i mean , a light ray like this , if we had it coming in diagonal , this light ray that 's oscillating like this , where the electric field oscillates like that , that also polarized . these are both polarized because there 's only one direction t... | does the reflected ray behaves like the light coming out of polarizer ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | they might have different values , but i 'm only going to see electric fields that point up or down . because of that , this light ray is polarized . so polarized light is light where the electric field is only oscillating in one direction . | what experiment was michael faraday doing with the polarized light ray ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you do n't want to see the glare off of the sun getting to you . so polarized sunglasses are useful . also , we can play a trick on our eye , if we really wanted to . | how exactly do polarized sunglasses work ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you do n't want to see the glare off of the sun getting to you . so polarized sunglasses are useful . also , we can play a trick on our eye , if we really wanted to . | do polarized sunglasses have something to do with the sun 's rays or just its reflection ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . | where did the energy go ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you can get light polarized in any direction , all at once , all overlapping . so if we draw this case for a light bulb , just a random incandescent light bulb , you might get light , some of the light , hitting you eye , you can get some light that 's got that direction , you got light that 's got this direction , you... | if yes , then why do we see light because light is composed of both the fields ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you were doing an experiment . you needed polarized light . well , that 's easy . | so light is an electromagnetic wave , does it mean that if you put a compass and shine a beam of polarized light beside it , it can affect the direction the compass needle points at ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | it 's often good enough to just know the direction of the electric field when we focus on the electric field . so what does polarization mean ? polarization refers to the fact that , if this light ray was heading straight toward your eye , or a detector , over here , what would you see ? | what is the opposite of polarization ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | why do this ? why send in two different waves to just get diagonally polarized light ? i could have just sent in one wave that was diagonally polarized and got the same thing . | or is it how we perceive two different light sources oscillating at pi/2 phase that it looks like it 's diagonally polarized ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so we send this in . what would happen ? well , at this point , you 'd have a electric field that points this way . | so where and when do this vector addition happen ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . | why would u send in 2 dif waves ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so we send this in . what would happen ? well , at this point , you 'd have a electric field that points this way . | what would happen if instead of only two waves used in movie theaters there were three of them ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so we send this in . what would happen ? well , at this point , you 'd have a electric field that points this way . | how would we receive the polarization and the image ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | it 's often good enough to just know the direction of the electric field when we focus on the electric field . so what does polarization mean ? polarization refers to the fact that , if this light ray was heading straight toward your eye , or a detector , over here , what would you see ? | what is the definition of polarization ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . | how can radiation be related to ecology ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | i could have just sent in one wave that was diagonally polarized and got the same thing . the reason is , if you shift this purple wave , this pink wave , by 90 degrees of phase , by pi over two in phase , something magical happens . let me show you what happens here , if we move this to here . | how do you shift the same wave of light by 90 degrees of phase to circularly polarize it once it goes through the glasses to your eye ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | you do n't want to see the glare off of the sun getting to you . so polarized sunglasses are useful . also , we can play a trick on our eye , if we really wanted to . | what is the pro and con of circular vs. linear polarized sunglasses ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | so you 'd actually receive this one first , then that one , then this one , then this one . because of that , you would n't see this going in a counterclockwise way , you 'd see this going in a clockwise circularly polarized way . sorry about that . | in what way polarization is going to help us ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | one component points up . that 's this electric field . one component points left . | wat is electro megnatic field ? |
- let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . so they 're made out of electric fields . and that 's not good enough . we know there 's not just electric fields . that could n't sustain itself . there 's got to be magnetic fields there , as well , that are ch... | - let 's talk about polarization of light . we know what light waves are ; they 're electromagnetic waves . | how does a 3d image differ from a 4d image in terms of light , and how do their glasses differ in terms of polarization ? |
we 're asked to graph the circle which is centered at 3 , -2 and has a radius of 5 units . i got this exercise off of the khan academy graph a circle according to its features exercise . it 's a pretty neat little widget here , because what i can do is i can take this dot and i can move it around to redefine the cente... | we 're asked to graph the circle which is centered at 3 , -2 and has a radius of 5 units . i got this exercise off of the khan academy graph a circle according to its features exercise . | what should be the exact angle between the plane and cone to get a parabola ? |
we 're asked to graph the circle which is centered at 3 , -2 and has a radius of 5 units . i got this exercise off of the khan academy graph a circle according to its features exercise . it 's a pretty neat little widget here , because what i can do is i can take this dot and i can move it around to redefine the cente... | the way it 's drawn right now it has a radius of 1 . the distance between the center and the actual circle , the points that define the circle , right now it 's 1 . i need to make this radius equal to 5 . | can a circle be considered a degenerate form of an ellipse ? |
we 're asked to graph the circle which is centered at 3 , -2 and has a radius of 5 units . i got this exercise off of the khan academy graph a circle according to its features exercise . it 's a pretty neat little widget here , because what i can do is i can take this dot and i can move it around to redefine the cente... | the way it 's drawn right now it has a radius of 1 . the distance between the center and the actual circle , the points that define the circle , right now it 's 1 . i need to make this radius equal to 5 . if i take that , so now the radius is equal to 2 , 3 , 4 and 5 . | does a radius touches the center of the circle ? |
we 're asked to graph the circle which is centered at 3 , -2 and has a radius of 5 units . i got this exercise off of the khan academy graph a circle according to its features exercise . it 's a pretty neat little widget here , because what i can do is i can take this dot and i can move it around to redefine the cente... | the way it 's drawn right now it has a radius of 1 . the distance between the center and the actual circle , the points that define the circle , right now it 's 1 . i need to make this radius equal to 5 . | if the given coordinates were the coordinates of the diameter of a circle ? |
we 're asked to graph the circle which is centered at 3 , -2 and has a radius of 5 units . i got this exercise off of the khan academy graph a circle according to its features exercise . it 's a pretty neat little widget here , because what i can do is i can take this dot and i can move it around to redefine the cente... | let 's see , whoops , nope , i want to make sure i do n't change the center . i want to increase the radius of the circle until it includes this point right over here , 0,4 . i 'm not there quite yet , there you go . | the point ( 0,4 ) for the circle radius was given but why was n't the circle on the x axis point zero ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | so you could read this as 253 times 7 , which we know is the same thing as 7 times 253 . and now we are ready to compute . and there are many ways of doing this , but this one you could call the standard way . | math-wise what does compute mean ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | it only has a ones place , so i 'll put the 7 right over here below the ones place in 253 . and then put the multiplication symbol right over here . so you could read this as 253 times 7 , which we know is the same thing as 7 times 253 . | at 0.18 why did you put large number at the upside ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the ones place in 253 . | how is it possible that the area can be smaller than the perimeter ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . | how does the negative * negative = positive work ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . | what is 305 x 6 ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . | how would i multiply equations like 543x23 or 123x345 ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the ones place in 253 . | what happens when there is a zero in the number ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | so you could read this as 253 times 7 , which we know is the same thing as 7 times 253 . and now we are ready to compute . and there are many ways of doing this , but this one you could call the standard way . | at 8 41 what does compute mean ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | so first i start with 7 times 3 . well , 7 times 3 we know is 21 . let me write that down . | is multiplying a 5-6 or 4 digit number well at least almost the same as multiplying a 3 and 2 digit number ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | so what i do is i start with my 7 . and i multiply it times each of the numbers up here , and i carry appropriately . so first i start with 7 times 3 . | when you multiply 5 or 4 digit numbers is it the same as multiplying 2 and 3 digit numbers ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | you could do this part in your head , but i just want to make it clear where i 'm getting these numbers from . what i would do in the standard method is i would write the 1 into 21 down here , but then carry the 2 to the tens place . now i want to figure out what 7 times 5 is . | when you carry the tens over to the hundreds place , would it be 35 tens or 30 tens and 5 ones ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . | what is a denominator and a numenador ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . | how do you find divison area models ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | it only has a ones place , so i 'll put the 7 right over here below the ones place in 253 . and then put the multiplication symbol right over here . so you could read this as 253 times 7 , which we know is the same thing as 7 times 253 . | why and and how can multiplication make a huge difference in life ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | we ca n't just put a 14 down here . we have this 3 to add . so 7 times 2 is 14 , plus 3 is 17 . so now we can write the 17 down here , because 2 is the last number that we had to deal with . | when will you do 2 digits time 1,2,3,4 digits ? |
let 's multiply 7 times 253 and see what we get . so just like in the last example , what i like to do is i like to rewrite the largest number first . so that 's 253 . and then write the smaller number below it and align the place value , the 7 . it only has a ones place , so i 'll put the 7 right over here below the o... | and so we have our answer . 7 times 253 is 1,771 . | what 's 114 -114 +115-1+1 ? |
- this is a rectangle . and yes , this is a rectangle . let 's measure the green line below using both rectangles and a centimeter ruler . so , we have this green line and we 're going to measure it in terms of rectangles and we 're going to measure it on this ruler . and you immediately see the green line is equal to ... | - this is a rectangle . and yes , this is a rectangle . | how can you tell when the units are different ? |
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