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Refraction (Snell's Law)

Airn₁ = 1.00 · speed 1.00cGlassn₂ = 1.50 · speed 0.67cθ₁ 40°θ₂ 25.4°Bends towards the normal
Snell’s law
n1sin⁡θ1=n2sin⁡θ2n_1\sin\theta_1 = n_2\sin\theta_2
Incident angle θ₁40°
Refracted angle θ₂25.4°
Critical angleOnly when n₁ > n₂
ResultTowards the normal
Try a material pair
  • Make the ray bend away from the normal (n₁ greater than n₂)
  • Raise the angle of incidence past 60°
  • Cause total internal reflection
  • Cause total internal reflection with n₁ set to 2.0