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Question
A ray of light strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is:
Draw a ray-diagram to illustrate your answer.
Options
30°
45°
60°
90°
MCQ
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Solution
60°
Explanation:
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