Question

A light ray is incident on a plane mirror . The mirror is rotated in the direction as shown in the figure by an arrow at frequency . The light reflected by the mirror is received on the wall at a distance from the axis of rotation. When the angle of incidence becomes the speed of the spot (a point) on the wall is:

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A

B

C

D

None of these

Hard
Solution
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Correct option is B)

Rotational speed of reflected light is given by,

Now,
The velocity of spot on wall is given as,



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