Question

Find a critical angle for a glass and water pair, given the refractive index of glass is 1.62 and that of water is 1.33.

Calculate the critical angle for the glass and water pair. Given the refractive index of glass is 1.62 and that of water is 1.33.

Answer 1

Given: Refractive index of glass, n₁ = 1.62

Refractive index of water, n₂ = 1.33

Formula:

sin C = `n_2/n_1`

= `1.33/1.62`

= 0.821

C = sin⁻¹ (0.821)

= 55°