s law calculator to calculate angle of refraction, critical angle, and total internal reflection. Calculate using n₁sin(θ₁) = n₂sin(θ₂).">

Snell's Law Calculator

Free calculate angle of refraction, critical angle, and total internal reflection using n₁sin(θ₁) = n₂sin(θ₂).

Input Parameters

degrees

Results

Enter parameters to calculate refraction

Snell's Law Formula

Snell's Law

n₁sin(θ₁) = n₂sin(θ₂)

Where:

  • • n₁, n₂ = refractive indices
  • • θ₁ = incident angle
  • • θ₂ = refracted angle

Critical Angle

θ_c = arcsin(n₂/n₁)

For total internal reflection (n₁ > n₂)

Related Physics Calculators

Explore more calculators in this category:

Browse all Physics Calculators →