Unpolarised light is incident from air on a plane surface of a material of refractive index u! At a particular angle of incidence `mu` it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation ?

Options

A. `I =tan^(-1)((1)/(mu))`
B. Reflected light is polarised with its electric vector parallel to the plane of incidence.
C. `i=sin^(-1)((1)/(mu))`
D. Reflected light is polarised with its electric vector perpendicular to the plane of incidence.

Answer

D

Explanation

When reflected and refracted rays are perpendicular then only `sigma` component are there in reflected light (which are perpendicular to incidence plane) in polarization in reflection