Question

The refractive index for a glass is 1.62.The sine of the critical angle for total internal reflections

Answer 1

μ = 1.62

μ = 1/ sin c

sin c = 1/μ

sin c = 1/1.62 = 0.617

sin c = 0.617

hence c = 38.097 ≈ 39.1 °