| | | 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 | |
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