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MHT CET 2021 (21 Sep, Shift 1) · Prism, Dispersion & Scattering

Prism, Dispersion & Scattering question from MHT CET 2021 (21 Sep, Shift 1)

Q62MHT CET 2021 · 21 SEP · SHIFT 1Medium

Prism, Dispersion & Scattering

A ray of light is incident at an angle 'I' on one face of thin prism. The ray emerges normally from the other face. Refractive index of the glass prism is ' $n$ ' and angle of prism is ' $A$ '. The value of ' $I$ ' is

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Answer: (a)

Normal emergence: $r_2 = 0$ , so $r_1 = A$ .
$\sin I = n\sin A$ ; small angles give $I = nA$ .
So the answer is (a) $An$ .

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