Question

two vertical plane mirrors are inclined at an angle of 60 degree with each other a ray of light travelling horizontally is reflected first from one mirror then from the other what is the resultant deviation

Answer 1

Explanation:

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If it is incident at angle x = 90 - ∠COB /2 = 60 deg., then its angle of incidence on mirror 2 is 0. Hence, it retraces the path after reflection from mirror1, then onto mirror 2, and again on mirror 1. So the angle of deviation is 180 deg.

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