answer q.no. 52 with full solution
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4th option 50 . ok please follow me .I have no followers. I have downloaded this app yesterday.
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ANSWER:
3)65°
STEP BY STEP EXPLANATION:
Construction (Draw Normal perpendicular to mirror N)
BY law of reflections
angle PQA = angle AQR
Therefore angle PQA + angle AQR = 50°
angle PQA = 50 /2 = 25°
Let normal be A
angle PQN + angle PQA = 90°
angle PQN + 25° = 90°
angle PQN = 90° - 25°
angle PQN = 65°
HENCE , answer is 65°
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