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Submitted by editor on 12 March, 2014 - 16:10


This contains list of some representative refractive indices.
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Many materials have a well-characterized refractive index, but these indices depend strongly upon the frequency of light. Standard refractive index measurements are taken at yellow doublet sodium D line, with a wavelength of 589 nanometres. There are also weaker dependencies on temperature, pressure/stress, et cetera, as well on precise material compositions (presence of dopants et cetera); for many materials and typical conditions, however, these variations are at the percent level or less. Thus, it is especially important to cite the source for an index measurement if precision is required. In general, an index of refraction is a complex number with both a real and imaginary part, where the latter indicates the strength of absorption loss at a particular wavelength—thus, the imaginary part is sometimes called the extinction coefficient k. Such losses become particularly significant, for example, in metals at short (e.g. visible) wavelengths, and must be included in any description of the refractive index.
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Some representative refractive indices,,Material,? (nm),nVacuum,,1 (by definition)Air at STP,,1.000277Gases at 0 C and 1 atm,,Air,589.29,1.000293Carbon dioxide,589.29,1.00045Helium,589.29,1.000036Hydrogen,589.29,1.000132Liquids at 20 C,,Arsenic trisulfide and sulfur in methylene iodide,,1.9Benzene,589.29,1.501Carbon disulfide,589.29,1.628Carbon tetrachloride,589.29,1.461Ethyl alcohol (ethanol),589.29,1.361Silicone oil,,1.336-1.582Water,589.29,1.33310% Glucose solution in water,589.29,1.347720% Glucose solution in water,589.29,1.363560% Glucose solution in water,589.29,1.4394Solids at room temperature,,Titanium dioxide (Rutile phase ),589.29,2.496Diamond,589.29,2.419Strontium titanate,589.29,2.41Amber,589.29,1.55Fused silica (also called Fused Quartz),589.29,1.458Sodium chloride,589.29,1.544Other materials,,Liquid helium,,1.025Water ice,,1.31Cornea (human),,1.373/1.380/1.401Lens (human),,1.386 - 1.406Acetone,,1.36Ethanol,,1.36Glycerol,,1.4729Bromine,,1.661Teflon AF,,1.315Teflon,,1.35 - 1.38Cytop,,1.34Sylgard 184 (Polydimethylsiloxane),,1.4118PLA,,1.46Acrylic glass,,1.490 - 1.492Polycarbonate,,1.584 - 1.586PMMA,,1.4893 - 1.4899PETg,,1.57PET,,1.575Crown glass (pure),,1.50 - 1.54Flint glass (pure),,1.60 - 1.62Crown glass (impure),,1.485 - 1.755Flint glass (impure),,1.523 - 1.925Pyrex (a borosilicate glass),,1.47Cryolite,,1.338Rock salt,,1.516Sapphire,,1.7621.778"Sugar Solution, 25%",,1.3723"Sugar Solution, 50%",,1.42"Sugar Solution, 75%",,1.4774Cubic zirconia,,2.15 - 2.18Potassium Niobate (KNbO3),,2.28Silicon carbide,,2.65 - 2.69Cinnabar (Mercury sulfide),,3.02Gallium(III) phosphide,,3.5Gallium(III) arsenide,,3.927Zinc Oxide,390,2.4Germanium,,4.01Silicon,590,3.96,,For other more formats kindly visit : www.downloadexcelfiles.com,,,,Original source : en.wikipedia.org/wiki/List_of_refractive_indices,,