A ray of light is incident on the surface of a glass plate at an angle of incidence equal to Brewster's angle `phi`. If `mu` represents the refractive index of glass with respect to air, then the angle between reflected and refracted rays is

Options

A. `90^(@)+phi`
B. `sin^(-1)(mucos phi)`
C. `90^(@)`
D. `90^(@)-sin^(-1)(sinphi//4)`

Answer

C

Explanation

At polarising angle, the reflected and refracted rays are mutually perpendicular to each other.