Critical Angle (TIR) calculator
Total internal reflection threshold between two media.
Category: Geometric Optics
Formula: sin θc = n₂ / n₁
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| n₁ (dense) | n1 | 1.5 | |
| n₂ (rare) | n2 | 1 |
Result with the default inputs
- Critical angle: 41.8103 °
- TIR exists: yes
Open it with your own values: put each input in the address as a parameter, for example /calculators/critical-angle-tir?n1=1.5. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Total internal reflection