A horizontal light ray passes through a prism (µ = 1.5) of angle 4°. Further, it is incident on a plane mirror M, that has been placed vertically. By what angle the mirror is rotated so that the ray after reflection becomes horizontal?
Text Solution
Verified by ExpertsThe correct answer is:
A
δ = (µ – 1) A = 2°
So by rotating mirror by 1° in clockwise direction, emergent ray after reflection will become horizontal.
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