JEE PHYSICS MCQ: WAVE OPTICS

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A ray of light travelling in water is incident on a glass plate immersed in it. When the angle of incidence is

51^{\circ}

, the reflected ray is totally polarized. Find out the refractive index of glass.

[The refractive index of water is 1.3 and

\tan 51^{\circ}=1.235

]

View answer and explanation

Correct option: A

1.605

Option A (1.605) is correct because it is calculated using Brewster's law, where the tangent of the polarizing angle equals the ratio of refractive indices.

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