On a glass plate a light wave is incident at an angle of 60∘. If the reflected

Question

On a glass plate a light wave is incident at an angle of

60^{\circ}

. If the reflected and the refracted waves are mutually perpendicular, the refractive index of material is

Options:

A . √32

B . √3

C . 32

D . 1√3

Answer: Option B
:
B
From figure

r = 30^{\circ}

∴ μ = \frac{s i n i}{s i n r} = \frac{s i n 60^{\circ}}{s i n 30^{\circ}} = \sqrt{3}

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