Snell's Law

Calculate the refraction angle of light passing between two media using Snell's Law.

Index of Refraction n1

Angle of Incidence θ1 (degrees)

Index of Refraction n2

About this calculator

Calculates the angle of refraction when light passes from one medium into another, using Snell's Law n₁sinθ₁ = n₂sinθ₂ — flags total internal reflection when no real refraction angle exists.