When the incidence angle is equal to the angle of emergence of light from the prism the refracted ray inside the prism

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Becomes perpendicular to the base of prism

Becomes parallel to the base of prism

Becomes perpendicular to the left face of prism

Becomes parallel to the right face of prism

answer is C.

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Detailed Solution

(c) At the minimum deviation, angle of incidence $∠ i$ = angle of emergence $∠ e$ and inside the prism refracted ray parallel to the base of the prism

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