Critical angle
sin θ_c = n₂/n₁ when n₁ > n₂.
Calculator
How to use
Critical angle
Denser to rarer medium.
Educational use only. Check signs, units, and modeling assumptions (e.g. flat Earth g, no air resistance unless stated).
sin θ_c = n₂/n₁ when n₁ > n₂.
Denser to rarer medium.
Educational use only. Check signs, units, and modeling assumptions (e.g. flat Earth g, no air resistance unless stated).
Model / formula
sin θ_c = n₂/n₁ (n₁ denser)
Result
θ_c = 41.8103°