Snell's Law / TIR Simulator

Adjust incident angle and refractive indices to explore refraction and TIR

Normal

Medium 1

Medium 2

Incident angle (°)

n₁

n₂

n₁sinθ₁ = n₂sinθ₂. If n₁ > n₂, TIR occurs when θ₁ > θc = arcsin(n₂/n₁).