A ray of light is incident on mirror 1. It reaches mirror 3 after getting reflected from mirror 1 and mirror 2. The ray makes an angle of 60° with mirror 3 after getting reflected from it, as shown.
Find the angle of incidence of the ray when it was incident on mirror 1.

30°

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60°

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90°

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45°

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Solution

The correct option is A 30°
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