instruction stringlengths 31 24.3k |
|---|
As I understand the Hubbard model in quantum condensed matter theory, we only consider electron-electron Coulomb interactions for two electrons (with opposite spins) in the same single-particle orbital since these are "short-range". However, the Hubbard model is then used to model a Mott insulator, which includes a con... |
The following is a diagram from my Fluid Mechanics module's lecture slides:
The topic is Fluid Machinery where the focus is on studying pumps. My question is on the suction and discharge heights depicted in this diagram. The heights depicted seem rather arbitrary/random. For example, the height on the left does not ev... |
Consider two observers in flat space-time, of which one, called Terrence, is stationary, while the other, called Stella, moves in an accelerated way. I am particularly interested in the case where Stella moves at a constant speed $v$ along a closed trajectory (hence the acceleration), but the question below is more gen... |
I have managed to get myself quite confused about something. Consider a two level system consisting of states $|0\rangle$ and $|1\rangle$. the projection operator onto the state $|0\rangle$ is given by $\hat{\sigma}_{00}=|0\rangle\langle0|$, and is clearly Hermitian. Being hermitian, you would expect the operator
$$\ha... |
in this Atwood machine digram
y1 is the amount that m1 gets displaced and y2 is the amount that m2 gets displaced the lecturer then wrote $y1=-y2$ ,
I am trying to understand what did he do to get this, when I tried to write a relation I took y1 and y2 as displacement from the ground the sum of this should give a ... |
When looking at absorption or reflectance spectra, say in the range of 400nm to 2500nm, you can see peaks (or dips) at certain wavelengths, that are characteristic for the material absorbing and reflecting the light. What property of the material determines the wavelength(s) where it absorbes light?
I am familiar with ... |
In the context of the dynamics of polymeric models, and specifically the dumbbell model, one of the forces acting on a dumbbell spring is said to result from "a time smoothed Brownian force" that results from Brownian motion of the surrounding fluid and its action on each of the beads (mid-sized particles). Its express... |
In the process of getting the formula of Christoffel symbols in the terms of metric tensors, we get
$$\partial_n g_{rm}+\partial_m g_{rn}-\partial_r g_{mn}=2\Gamma ^t_{mn} g_{rt}. $$
The book I have read goes ' multiply both sides of the equation by the inverse metric tensor' and yields
$$\Gamma ^t_{mn}={1\over 2} g^{r... |
I have two questions about time dilation near a black hole.
(I question) The relation $d\tau^2 = (1-\frac{r_s}{r}) dt^2$ between the proper time $d\tau$ of an observer near a B.H. and the time dt relative to an observer infinite far away , is true only in the static case?
(II question) Consider a free falling observer ... |
I am having a real difficult to counting degree of freedom. In fact, I notice that sometimes I am confused about what exactly we count as DoF, and what we do not count.
See, for example, the electromagnetic field. The potential has a gauge symmetry
$$\partial_{\mu} A^{\mu} = 0$$
Now, initially, in $d=4$, this potential... |
Consider the following two points, or events as they are more commonly called, in SpaceTime:
Event 1: $(x,t) = (0,0)$
Event 2: $(x,t) = (a,0)$
Take t=0 to correspond to the first moment in time.
As you can see they are merely two separate locations, Event 2 could be any point in space. Since their t coordinates are th... |
how did the development of quantum electrodynamics impact the development of modern unified field theories?
and did any other theories have more significant impact?
|
This is the explanation from Wikipedia:
Is there a more rigorous proof or explanation of how reducing the integration region to these sub-regions introduces a $\frac{1}{n!}$ factor? I am confused about why the number of these sub-regions is $n!$ in the first place. They way the sub-regions are defined it would seem as... |
This is the typical experimental setup to determine the unknown resistance of a given wire. As we move the sliding contact of the rheostat, we get different values of voltage and current. a plot of V vs i gives a straight line, and the slope of this line is the wire's resistance. Here, why doesn't the resistance of th... |
I want to know the different thermal behaviors between cosmological and black hole horizons, such as temperature, entropy and so on.
|
I was looking for the working of a two way mirror when I came across this video. The person says that if you place your finger on the mirror and there's no gap between the image and the finger, then it should be a two-way mirror.
Does this really work? Shouldn't the image always appear to touch one's fingertips becaus... |
Why is tangential velocity 2πr/T if the body's total displacement in the end of one revolution is zero?
|
Feynman shows in his Lectures on physics, Volume 2, Section 5.10 that in a hollow conductor there can be no electric fields inside the cavity. But he also says that no static charge distribution Q inside a hollow conductor can produce electric fields outside the conductor, that shielding also works the other way. But h... |
If entangled pair is created by SPDC expescially by BBO crystal are they automatically identical e.g. indistinguishable? If the state is HV+VH do they get identical by disentangling them and then rotate H to V of one of them?
|
An orbital can hold upto 2 electrons. Let's take 1s orbital of helium.
Now, we use probability density to depict where we can find the electrons in the orbital if we make measurements. Since two electrons share the same region or atleast has alot of overlapping in 1s orbital, how will the two electrons positions be if ... |
I am reading about Boltzmann equation and I am having a hard time making a link between elastodynamics and phonon equations. Clearly there should be a limit where both are one and the same, isn't it? How is the thermal conductivity or the time-relaxation rate related to the elastic coefficients of wave propagation in l... |
My town wants to build a noise protection wall on one side along railway tracks. Houses are on both sides of the railway tracks. Obviously the noise protection wall will cancel out sound on the equilateral side but the railway administration told it also would cancel out sound on the opposite side. According to them th... |
When searching up the different types of motion, results show circular motion, translational motion, oscillatory motion, rotational motion, periodic motion, etc. But just to clear things up in my head, all types of motion can be described as either translational or rotational right? To me it seems like an object either... |
I know the Flux (calculated from flux density), and frequency but i dont think I have area.
This is the question, it is part d and ive done all other parts:
"Consider three widely separated frequencies:
i) 5.5×1014 Hz
ii) 4.8×1017 Hz
iii) 5.0×107 Hz
1a. Convert frequency to wavelength for each of these frequencies, and... |
How time dilation creates gravity? I'm assuming gravity is not a force(Einstein's words)
|
I was just revising my notes of Quantum harmonic Oscillator when an idea struck my head. To build up to the question, we start with the creation and annhilation operators.
$$a=\sqrt{\frac{m\omega}{2\hbar}}X+i\frac{1}{\sqrt{2m\hbar\omega}}P$$
which is the annhilation operator and the creation operator is:
$$a^{\dagger}=... |
I'm just confused as to what it says in the diagram. Could somebody please explain?
|
The metre was defined at the end of the $18^{th}$ century as the ten-millionth part of the quarter of the meridian (from the north pole to equator). Then, from $1983$ the definition changed for the distance traveled by light in a rather short elapse of seconds.
My question is, did the value of the metre change in absol... |
In a perfectly elastic collision the two bodies that collide will end up maintaining their complessive initial momenta and kinetic energy. Basically if body A impacts against body B at 10 m/s (with both bodies having a mass of 1 kg) it’ll bounce back still going at 10 m/s - maintaining therefore its original KE of 50 J... |
This is one of those right brain questions where I would like to get an intuitive picture of something. Therefore it's going to be hard to express, and probably even harder to understand and answer. I do apologise in advance!
I have always considered that the reason why tiny matter like electrons behave in the counter... |
It's funny, I used to wonder this at school many years ago. For the purposes of discussion, imagine there is a big (very massive) cube that slides towards you as you're sitting on the floor. It doesn't move fast, perhaps (say) walking pace. Would it kill you on contact?
My original intuition is that it would, since pre... |
Consider a Lagrangian with two scalar particles $V,A$:
$$
L =L_{\text{kin}}(V)+L_{\text{kin}}(A)+g_{VA}VA.
$$
It looks to me that I can treat the $VA$ term either as a mixing term, diagonalizing the Lagrangian and introducing a mixing angle $\theta_{VA}\sim g_{VA}/(m_{V}^{2}-m_{A}^{2})$, or as an interaction term.
Now,... |
I read that neutron and protons are attracted through exchanging pions between each other. However, as far as I understand, they are just exchanging a meson, not any force carriers. What causes them to bind together?
|
We know that when things move close to the speed of light, their lengths contract.
Can this be observed when we accelerate electrons close to the speed of light? Do they measure shorter when they're at that speed?
|
If an observer is inside a carousel in circular motion and turns on a light after the light rays complete one full rotation around the carousel, will the light rays reach the observer simultaneously or at different times?
|
Consider a function of a complex variable $\omega$ which is given by $f(\omega) = e^{-\omega^2/2}$.
This function is symmetric, holomorphic everywhere, and vanishes as $|\omega| \rightarrow \infty$. Thus the Kramers-Kronig relations tell us that, given the real part we can find the imaginary part:
$$
\Im[f(\omega)] = \... |
I know that for first question,resistance increases..
In second question,it is asked to find the power when bulb glows at full brightness,
I think it is NOT 1A*200V=200w
What i think is that,we should take current at t1,and not at t0,because,
the bulb only starts to glow after t1(when heat is produced enough), and tha... |
im confused about the relationship between these terms, my intuition tells me that vacuum energy and zero point energy are synonymous and that they are a consequence of vacuum fluctuations. But I wouldn't be surprised if I'm completely wrong.
This within the context of quantum field theory.
|
I am currently working on a project involving a PVC pipe system for drainage, where I use a 3" main pipe with 25 secondary 1" drain pipes feeding into it. In my simulation, I have considered two options for connecting the secondary drain pipes to the main pipe: a 3"/1" T-junction and a 3"/1" Y-junction.
Initially, I an... |
Suppose you have qudits A and B. They are each of some large dimensionality d and are maximally entangled with each other. Is it possible, by some protocol, to split these two qudits into C, D, E, & F each with some lower dimensionality than d and still maximally entangled with each other?
|
In hadron spectroscopy, a structure may be interpreted as various "configurations", such as conventional quark-antiquark states, tetraquarks, hybrid states, dynamically generated states or molecular states, and so on.
What is the meaning of dynamically generated states here?
|
Suppose you have an e-bit between qubits A and B. You want to transfer the state of qubit Q to B. You can utilize this e-bit to perform a quantum teleportation to achieve this.
Now instead suppose that Q remains a qubit, but A and B are qudits of some higher dimensionality. Similarly, instead of an e-bit, they now inst... |
Define quantum probability theory to be an axiomatic mathematical theory which appropriately generalizes classical (Kolmogorov) probability theory to provide the precise probabilistic framework underlying the empirical results and established theory of quantum mechanics.
Does such a quantum probability theory exist? I ... |
I´ve been solving the following problem and I need some guidance. The problem asks to calculate all the components of the field momentum of a circular toroidal coil of mean radius a and N turns with a small cross section area A (which is small compared to a). The toroid has corrent I flowing in it and there is a point ... |
I want to know a concrete derivation of 3D Stokes stream function.
The statement is, for example in 3D spherical coordinates (with symmetry in rotation about the $z$-axis), if
$$\nabla \cdot u=0\tag{1}$$
which is
$${1\over r^2}{\partial \over \partial r}(r^2 u_r)+{1\over r \sin\theta}{\partial \over \partial \theta}(\... |
Much like in an earlier post of mine, I'm now calculating the phase diagram
of a ternary system (Ag-Al-Cu, to be specific), which has some phases modelled as sublattices (using this publication for the description).
With the help and method of the earlier post, I have already managed to model the theta phase, (Al)2(Ag,... |
From a SPDC source we get two photons in a $|VH\rangle+|HV\rangle$ state. How is to be proven experimentally that they are identical while one would be in $|H\rangle$ and the other in $|V\rangle$ polarization after a PBS?
|
I am an aspiring quantum chemist and have come across two vastly different versions of the Adiabatic Approximation when studying Quantum Mechanics from the perspective of physics and chemistry respectively.
The first one is the one covered in most standard textbooks [Sakurai for example] where it is stated as follows [... |
I’m currently studying quantum annealing and its application to solving the shortest path problem. However, I’m facing challenges in defining the problem Hamiltonian, whose ground state should encode the solution to this specific optimization problem.
Setup: Given a graph (G = (V, E)) with a set of vertices (V) and edg... |
In Chapters 1 and 2 of Introduction to Quantum Mechanics Third edition, Griffiths and Schroeter state that to get kinetic energy operator one replaces momentum with $p\rightarrow -i\hbar\,\partial/\partial x$ in kinetic energy expression.
But
$$K=\frac{p^2}{2m}\rightarrow-\frac\hbar{2m}\left(\frac\partial{\partial x}\r... |
The dynamics of entanglement entropy $S$ out of equilibrium can be understood in some regimes from the point of view of the quasiparticle picture: an excited state acts as a source of pairs of quasiparticles with opposite momenta which are entangled, and since they are assumed to travel ballistically, they generate a l... |
The logarithm of the canonical partition function in two dimensions when the interaction energy is zero and in the absence of the external magnetic field is expected to be log 2 in the thermodynamic limit. It is not clear whether this limiting value has been indicated in any text or research paper, when Bethe approxima... |
The classical proof of cosmological redshift that leads to the relation:
$\frac{\lambda_0}{\lambda_e}=1+z=\frac{a\left(t_0\right)}{a\left(t_e\right)}$
is quite well known as for example (among many other textbooks) available here https://people.ast.cam.ac.uk/~pettini/Intro%20Cosmology/Lecture05.pdf.
However all textboo... |
I have a crystal with 2 atomic species, A and B. I'm interested in the interatomic force constants (IFCs) and I have a program that computes them for a given supercell. Basically, I have to provide the unit cell and a supercell derived from it and the program returns the force constants between each atom of the unit ce... |
Recently I read on Spaceweather.com
https://spaceweatherarchive.com/2024/02/
a surprising paper according to which the space debris or vaporized material (mostly metals) that has been deposited in near-Earth space for decades, which is produced when satellite or rocket parts burn up on re-entry into the atmosphere, cou... |
Is it true that in a simple circuit where a simple conducting wire is connected to a battery, the force on each charge carrier is same in magnitude ? If yes, then can you explain how? I know that if there is a single charge, the force acting upon that charge will be same irrespective of its position in the wire, but in... |
I recently learnt that in a solid lattice there are many energy levels which are so continuous that they look like bands...
In silicon' valence band,there are those millions of 3p energy levels with 2 electrons in each..
Why dont electrons go to those empty p orbitals in the energy shell??
Like only px and py are fille... |
I couldn't get through this 'easy question' that was in my morning exam, it goes
Q. If linear momentum of body is increased by 50%, then K.E of that body increases by....%
**My solution **
K.E = $E=\frac{P^2}{2m}$-----(1)
differentiating w.r.t P
$$dE=\frac{2PdP}{2m}$$
divide by E on both sides gives
$$\frac{dE}{E}=\fra... |
Suppose a spherical conductor with a finite number of charges and a diameter of some finite magnitude is subject to a field that is almost infinitely large in magnitude. With the charges redistributed in layers of negative and positive charges, how would the conducter ever be able to create a field that is also infinit... |
I am probably going to ask this wrong, so please don't flame me. I am not a scientist or student....
If an entangled particle enters an event horizon but has not reached the singularity, can we still use its partner to perform measurements on it? Or is the entanglement broken immediately upon crossing the event horiz... |
In many textbooks on string theory, some time is spend on quantizing the relativistic point particle as a warming-up for quantizing the Nambu-Goto action for relativistic strings.
However, I have not found a clear explanation of why the theory of the quantum relativistic point particle is insufficient. What does this ... |
So, a while ago I learned that a spherical isolated conductor can act as a capacitor now my question is how? I mean, a capacitor usually requires two plates to hold charge but in this case there's just one charged conductor. So how is it really storing energy?
|
What device is used to rotate photons from H to V. Does it change the energy of the photons? I heard about half wave plate?
|
I am currently trying to solve the problem of a particle confined within an infinite well subject to a linear electric field (i.e. triangular well). This entails solving the Schrodinger equation
$$-\frac{\hbar^2}{2m}\partial^2_x\psi_n(x) + (V_l(x) +V_w(x)) \psi_n(x) = E_n \psi_n(x)$$
where $V_l(x) = q \varepsilon x $ (... |
This is from page 58 of Kardar's "Statistical Physics of Particles":
Therefore, there must be a very large number of microstates corresponding to the same macrostate $M$.
This many-to-one correspondence suggests the introduction of a statistical ensemble of microstates. Consider $N$ copies of a particular macrostate,... |
When XL equals XC, impedance Z becomes equal to R and the circuit is in resonance with the source frequency. But what would be the effect on impedance, phase power dissipated when R=XL-XC i.e. when the difference between inductive reactance and capacitive reactance of an AC circuit equals to its resistance?
|
Sunlight hitting a patch of the earth's surface causes the sun to lose entropy and the earth to gain entropy and there is a net gain in entropy (Delta S). But if that sunlight causes a plant to grow on that patch, then I'm not sure how to account for that entropy-wise. Is the growing plant (assume its 100 moles of carb... |
This can, of course, be calculated mathematically. However it is difficult for me to believe that this is a pure mathematical coincidence. Perhaps I don't understand reciprocal lattices the way I should. Is there a physical/intuitive way to explain this?
|
If I observe a change in direction of velocity, but not in speed: What does the acceleration vector look like?
I am confused! The difference vector between two vectors of equal length A has a different length than A. But acceleration is defined by the time derivative of velocity (which is a vector quantity) and thus by... |
CMB photons can be affected by the expansion of the universe through the linear integrated Sachs-Wolfe effect (ISW) 1 and the non-linear ISW effect or also called Rees-Sciama effect 1.
In particular, according to the ISW effect, the photons crossing superclusters would leave them having a total net blueshift (because o... |
Consider the Gell-Mann matrices, with
$$
\lambda_3 = \operatorname{diag}(1, -1,0), \quad \lambda_8 = \frac{1}{\sqrt{3}}\operatorname{diag}(1, 1, -2), \quad, ... \ ,
$$
they span the Lie algebra $\mathfrak{su}(3)$. The Lie algebra transforms under the Lie group (not Lie algebra) $SU(3)$ in the adjoint representation, ... |
The formula for the isobaric heat capacity is
$$C_p = \left(\frac{\partial U}{\partial T}\right)_V + \left[\left(\frac{\partial U}{\partial V}\right)_T+p\right]\left(\frac{\partial V}{\partial T}\right)_p.$$
Isn't the term
$$\left(\frac{\partial U}{\partial V}\right)_T$$
supposed to be zero, as it describes a process w... |
I'm reading some lecture notes on quantum mechanics, while describing the rigid rotor in bra-ket notation, the author mentions the parity operator $\hat{P}$ acting on kets as $\hat{P} \left \lvert m \right \rangle = \left \lvert -m
\right \rangle$, then the author says that the operator is real by showing that $\hat{... |
In my book, it is given:
The resistivity of an alloy is generally higher than that of its constituent metals. Alloys do not oxidise (burn) readily at high temperatures. For this reason, they are commonly used
in electrical heating devices, like electric irons, toasters etc.
If we want more heat, shouldn't we want mor... |
My question is this; does time dilation, or do any other effects of relativistic-velocity travel, effect the experience of the effects of acceleration in any way?
So, for instance, if an Astronaut is being accelerated at a constant 10G's acceleration, will the eventual increasing time dilation, or other effects such as... |
Apparently, the luminous flux and therefore indirectly the lumen (lm), one of the 7 basic SI units, is defined in terms of "the" 1924 luminous effiency function $\overline{y}(\lambda)$ of the CIE, which is itself a dimensionless function of wavelength. More precisel, the luminous flux $\Phi_v$ is defined as
$$\Phi_v = ... |
The book from which I have taken this picture claims that the force on the segment X in the first case is less than th force acting on it in the second case. I don't think this is true unless one carries out the full calculation. The wire segment on the left causes a magnetic field that changes with each single point ... |
A,B are connected to a battery with $V$ voltage. When $S$ is open we can just calcualte the total capacitance simply. What happens when it's close? I don't see which capacitors are connected series and parallel. I attemped this:
I know that everything in the green must get to equal potential, and charge will move acc... |
My doubt is
Why is intensity halved each time an unpolarised light passes through a polaroid?
My thought process is that if an unpolarised light passes through a polaroid, it will polarise the incoming light and we will have a polarised light with half of initial intensity.
And if the same light is passed through the... |
If I connect a fuse and a bulb in series with:
fuse to the live and bulb to the neutral
fuse to the neutral and bulb to the live
During an overloading would this cause:
the fuse to blow and successfully protecting the bulb in the first case
the bulb to get damaged before blowing the fuse in the second case
or
just... |
My question is quite simple, but I couldn't find the answer anywhere.
Hubbard Models usually have a hopping term as follow:
$$H_{hop} = -t \sum_{<i,j>} \left( c^{\dagger}_{j} c_{i} + c^{\dagger}_{i} c_{j} \right)$$
Considering the basis is made of |0,0,0,0> , |0,0,0,1>, ..., |1,1,0,0>, |1,0,1,0>, ..., |1,1,1,1>, I must... |
As I understand vortices form when a part of a fluid is moving with greater velocity, than its neighbour parts, so its neighbour parts that are moving slower ''want to slow down its faster neighbour part(s)'' and faster parts ''want to continue moving faster'', so faster and slower moving parts ''resolve this problem''... |
I feel like I've been frequently presented with an interpretation of EM waves that goes something like this:
Light is an oscillating electromagnetic field. Because changes in the electric field produce changes in the magnetic field and vice versa, it is self propagating. The electric field of light can be represented... |
I can not seem to grasp, why exactly does light travelling through space without the need of any medium was baffling for the scientists of 1800's.
|
Let’s say I measure the spin of an electron, but I don’t tell you what it is and you don’t measure it yourself. Does that change the wave function for you or does it remain the same either way? If it remains the same, can you still measure the particle as having opposite spin? How does that work?
|
I want resources for studying in detail the connection between the mathematical structures of physical theories and said physical theories.
For example, i know what a Hilbert space or a principal bundle is from a mathematical point of view and i know we use them in physics but i don't have any detail as how and where w... |
Given a Hilbert space and a Hermitian operator defined on it, will the operator exhibit Hermiticity in any basis used to span the space? My thought on this is that this must be the case, after all, if an operator is Hermitian then it represent an observable. Surely, whether or not an operator is an observable cannot de... |
The Compton scattering of the X-ray from electron is depicted below with x-axis being the dir. of the incident photon:
Its wavelength shift amounts to:
$$ \lambda_f - \lambda_i = \frac{h}{m_ec}(1-cos\theta) \tag{1}\label{eq1}
$$
where $m_e$ is the electron rest mass and $\frac{h}{m_ec}$ is known as the Compton wavele... |
When a neutron star forms, is its entropy lower than when it was in the form of the star core. In the case of a black hole the entropy becomes the surface area, so what happens in a neutron star because the neutron star doesn't get significantly brighter from the collapse and the matter in the neutron star is in a more... |
I got stuck on a step in Example 4.8 of Griffiths. It places a charge $q$ a distance $d$ above an infinite linear dielectric material.
The Problem
It states the the field due to the bound charge $σ$ is $-σ/2e$. However, I would've expected it to be $σ/2e$ since the normal vector should be facing upwards in the $z$-axis... |
When you place a ruler on the edge of the table so that one end is hanging off the table, and you apply a force to the hanging end with your hand, at what angle (angle between ruler and table) will the ruler fall?
I've identified the forces acting on the ruler and the position of the centre of mass; however, I'm a bit ... |
The generating functional is defined as:
$$Z[J] = \int \mathcal{D}[\phi] \exp\Big[\frac{i}{\hbar}\int d^4x [\mathcal{L} + J(x)\phi(x)]\Big].$$
I know this object is used as a tool to generate correlation functions by taking functional derivatives, but does it have any interpretation on its own? In this post the answer ... |
Seemingly, the drift velocity is from the electric field pushing in the same direction of the (theoretical positive) current along all of the wire, but then this is a loop that is a not conservative field (i.e. accelerating everywhere from the electric field along the loop), so why does Kirchoff's voltage rule apply?
|
Let $D_n$ denote the $n$-point correlation function consisting of only connected diagrams. We may decompose this as an integral of two products. The first factor consists of a product over the $n$ external legs and their corrections, each denoted $E^{(n)}_i$, so this factor becomes $\prod_{i=1}^n E^{(n)}_i$. The secon... |
if matter has a dual nature and everything is made up of matter then why do macroscopic bodies like humans or trees or a cars is not showing wave motion like why are they static and not moving like a wave?
|
So this is more of a special relativity question as it comes from someone who's only savvy in special relativity.
What I mean by this is if the answer is only describable in terms of general relativity, I'd simply prefer that you say so rather than try to explain it with concepts that are currently above my level.
Now ... |
If we know how far away are the two known stars from Earth, then is it a safe bet that we can know how far apart those two stars are from each other using sine rules? Does that mean we must first assumed curvature of space-time is flat or from the calculation of the position of the stars we can then inferred the shape ... |
If temperature is the "average" result of measuring a mix of hot and cold air particles, then I can be in a room of some warm temperature but being hit with both extremely hot particles and extremely cold particles at the same time? So even though the overall temperature is totally safe and warm, I can still get (heat/... |
When two slits produce an interference pattern, and one slit is closed, then the interference pattern disappears. Why? As one-slit interference is still possible. What should be the measurements of each slit for this to occur? That is, that, starting with a double slit, closing one slit does not eliminate the interfere... |
I am studying the 3rd edition of Goldstein's Classical Mechanics and in the discussion of scattering in a central field, the author mentions (but does not give the formula for) the following potential in the context of "rainbow scattering" (p. 111):
I was wondering if this is a well-known potential and, if so, where c... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.