A small plane mirror placed at the centre of a spherical screen of rad – McqOptions

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1.	A small plane mirror placed at the centre of a spherical screen of radius R. A beam of light is falling on the mirror. If the mirror makes n revolution. per second, the speed of light on the screen after reflection from the mirror will be
A.	4pnR
B.	2pnR
C.	\[\frac{nR}{2\pi }\]
D.	\[\frac{nR}{4\pi }\]
Answer» B. 2pnR

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