| Wavelengths | |
| Sodium D lines | 590 and 589.6 nm |
| Absolute refractive indices (mean) | |
| Diamond | 2.42 |
| Glass | 1.5 |
| Glycerol | 1.46 |
| Paraffin | 1.43 |
| Perspex | 1.49 |
| Turpentine | 1.48 |
| Water | 1.33 |
| Albedo of various surfaces | |
| Average for the Earth | 0.4 |
| Jupiter | 0.70 |
| Mars | 0.17 |
| Moon | 0.073 |
| Fresh clean snow | 0.8-0.9 |
| Venus | 0.72 |