Question

A ray of light strikes a glass plate at an angle $60$ if the reflected and refracted rays are perpendicular to each other, the index of refraction of glass is

Answer 1

Given from figure angle of incidence $i={60}^0$

angle of refraction $r={30}^0$

We know $\mu =\frac{\sin i}{\sin r}$

$\mu =\frac{\sin 60}{\sin 30}=\frac{\sqrt{3}}{2}\times 2=\sqrt{3}$