Optical Properties
Massive borosilicate glass 3.3 has a high ability to transmit light throughout the visible range of the spectrum. Ranging from approx. 320 to 2400 nm there is virtually no absorption through the thickness of glass generally encountered in laboratory glassware (up to approx. 6mm). The following table shows additional data:
| Refractive index (sodium D line) | 1.474 |
| Dispersion (nf-nc) | 0.00738 |
| Visible light transmission | 92% in 2 mm thick glass 91% in 6 mm thick glass |
| Stress optical coefficient | 4.0 ⋅ 10-6 mm2 ⋅ N-1 |
