Question

A ray of light is incident at the glass-water interface at an angle . It merges finally parallel to the surface of the water. Then, the value of would be(where is the refractive index of glass with respect to water)

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A

B

C

D

Medium
JEE Advanced
Solution
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Correct option is B)

Applying Snell's law at glass-water surface,

Applying Snell's law at water-air surface,

Multiplying (i) and (ii),
.

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