A light ray I is incident on a plane mirror M. The mirror is rotated i – McqOptions

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1.	A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency \[9\pi /rps\]. The light reflected by the mirror is received on the wall W at a distance 10m from the axis of rotation. When the angle of incidence becomes \[37{}^\circ \] the speed of the spot (a point) on the wall is:
A.	10 m/s
B.	1000 m/s
C.	500 m/s
D.	None of these
Answer» C. 500 m/s

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