Question

Unpolarized light is incident on a polaroid of refractive index 1.2. What should be the angle of incidence such that the reflected and refracted rays are perpendicular to each other?

(a) 50.19°

(b) 55.23°

(c) 57.45°

(d) 60.89°

Answer 1

Correct option is (a) 50.19°

The explanation is: Using Brewster’s Law, μ = tanip

In this case, i + r is equal to μ/2.

For glass, μ = 1.2

Therefore, ip = tan^-1μ = 50.19°.