Physics
Snell's Law (refraction angle)
Refraction angle from indices and incidence.
Formula
Formula
θ2 = asin(n1 sinθ1n2)
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| n₁, n₂ | refractive indices | computed result | — | result |
| θ₁ | incidence angle (deg) | computed result | — | result |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenn₁ = 1, θ₁ (deg) = 30, n₂ = 1.5
Result19.47122063
Example 2
Givenn₁ = 1.33, θ₁ (deg) = 45, n₂ = 1
Result70.12760616