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Q.

A plane mirror rotating at an angular velocity of 3 rad/sec reflects a light beam. The angular velocity of the reflected beam is ………..rad/sec.

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answer is 6.

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Detailed Solution

Angular velocity of the reflected ray is double of the angular velocity of the mirror.

ωref_ray=2×ωmirror=2×3=6 rad s-1

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A plane mirror rotating at an angular velocity of 3 rad/sec reflects a light beam. The angular velocity of the reflected beam is ………..rad/sec.