Answer to Question #284015 in Physics for Fares Ahed

Question

What should be the angle of incidence of a light ray incident through air on the boundary separating air from water so that the angle of refraction is 30°? (refractive index of air is 1 and that of water is 1.32)

Answer 1

The angle of incidence is

$$\theta_i=\arcsin(n\sin\theta_r)=41°.$$