Question

Unpolarised light is incident on a plane glass surface having refractive index root 3 then angle of incidence reflected and refracted rays will become perpendicular to each other is

Answer 1

Explanation:

Unpolarized light is incident on a plane glass surface having refractive index . The angle of incidence at which reflected and refracted rays would become perpendicular to each other is 15°

Answer 2

The angle of incidence is 60 degrees.

Explanation:

The refractive index of glass is $\sqrt{3}$.  We need to find the angle of incidence at which incident and refracted rays would become perpendicular to each other. When the ray of light is incident at a polarising angle, then the angle between incident and reflected ray is 90 degres. So,

$\tan i=n\\\\i=\tan ^{-1}(n)\\\\i=\tan ^{-1}(\sqrt{3})\\\\i=60^{\circ}$

So, the angle of incidence is 60 degrees.

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