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A small plane mirror placed at the centr...

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

`4 pi nR`

B

`2 pi nR`

C

`(nR)/(2pi)`

D

`(nR)/(4pi)`

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The correct Answer is:
a
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