Question

A ray is incident on the surface of glass plate of refractive Index √3 . What is the value of angle of incidence, if reflected light is completely polarized P.

Answer 1

it is given that, refractive index of glass , $\mu$ = √3

we know, when reflected light is completely polarized , $\bf{tani=\mu}$

where i denotes angle of incidence and $\mu$ refractive index of glass with respect to medium.

so, $tani=\sqrt{3}=tan60^{\circ}$

or, $i=60^{\circ}$

hence, incidence angle = 60° , if reflected light is completely polarized P.