Question
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
Answer: Option A
:
A
When plane mirror rotates through an angleθ, the reflected ray rotates through an angle 2θ. So spot on the screen will make 2nrevolution per second.
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:
A
When plane mirror rotates through an angleθ, the reflected ray rotates through an angle 2θ. So spot on the screen will make 2nrevolution per second.
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