Snell's Law Calculator

Calculate light refraction using n₁ sin θ₁ = n₂ sin θ₂. Find refracted angles, critical angles, and total internal reflection conditions with material presets.

Snell's Law: n₁ sin θ₁ = n₂ sin θ₂

Medium 1

Medium 2

Results
n₁
1.0003
θ₁
30°
n₂
1.52
θ₂
19.2109°

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Added Oct 1, 2026

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