"Material","λ (nm)","n"
"Vacuum","","1 (by definition)"
"Air at STP","","1.000277"
"Air","589.29","1.000293"
"Carbon dioxide","589.29","1.00045"
"Helium","589.29","1.000036"
"Hydrogen","589.29","1.000132"
"Arsenic trisulfide and sulfur in methylene iodide","","1.9"
"Benzene","589.29","1.501"
"Carbon disulfide","589.29","1.628"
"Carbon tetrachloride","589.29","1.461"
"Ethyl alcohol (ethanol)","589.29","1.361"
"Silicone oil","","1.336-1.582"
"Water","589.29","1.3330"
"10% Glucose solution in water","589.29","1.3477"
"20% Glucose solution in water","589.29","1.3635"
"60% Glucose solution in water","589.29","1.4394"
"Titanium dioxide (Rutile phase )","589.29","2.496"
"Diamond","589.29","2.419"
"Strontium titanate","589.29","2.41"
"Amber","589.29","1.55"
"Fused silica (also called Fused Quartz)","589.29","1.458"
"Sodium chloride","589.29","1.544"
"Liquid helium","","1.025"
"Water ice","","1.31"
"Cornea (human)","","1.373/1.380/1.401"
"Lens (human)","","1.386 - 1.406"
"Acetone","","1.36"
"Ethanol","","1.36"
"Glycerol","","1.4729"
"Bromine","","1.661"
"Teflon AF","","1.315"
"Teflon","","1.35 - 1.38"
"Cytop","","1.34"
"Sylgard 184 (Polydimethylsiloxane)","","1.4118"
"PLA","","1.46"
"Acrylic glass","","1.490 - 1.492"
"Polycarbonate","","1.584 - 1.586"
"PMMA","","1.4893 - 1.4899"
"PETg","","1.57"
"PET","","1.5750"
"Crown glass (pure)","","1.50 - 1.54"
"Flint glass (pure)","","1.60 - 1.62"
"Crown glass (impure)","","1.485 - 1.755"
"Flint glass (impure)","","1.523 - 1.925"
"Pyrex (a borosilicate glass)","","1.470"
"Cryolite","","1.338"
"Rock salt","","1.516"
"Sapphire","","1.762–1.778"
"Sugar Solution, 25%","","1.3723"
"Sugar Solution, 50%","","1.4200"
"Sugar Solution, 75%","","1.4774"
"Cubic zirconia","","2.15 - 2.18"
"Potassium Niobate (KNbO3)","","2.28"
"Silicon carbide","","2.65 - 2.69"
"Cinnabar (Mercury sulfide)","","3.02"
"Gallium(III) phosphide","","3.5"
"Gallium(III) arsenide","","3.927"
"Zinc Oxide","390","2.4"
"Germanium","","4.01"
"Silicon","590","3.962"