List of refractive indices List Some representative refractive indices

| 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 |