Angle of Incidence Calculator
Calculate θ₁ from n₁, n₂, and θ₂
How to Use This Calculator
- Enter n₁ and n₂ for the two media.
- Enter the angle of refraction θ₂ in degrees.
- Click Calculate to find θ₁, the angle of incidence.
Formula
n₁sin(θ₁) = n₂sin(θ₂)
θ₁ = arcsin((n₂sin(θ₂))/n₁)
Frequently Asked Questions
What are typical refractive indices?
Air ≈ 1.0, water ≈ 1.33, glass ≈ 1.5, diamond ≈ 2.42.