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A beam of light from a source L is incid...

A beam of light from a source L is incident normally on a plane mirror fixed at a cetain distance x from the source.The beam is relfected back as a spot on a scale placed just above the source L.when the mirror is ratated through a small angle `theta` the spot of the light is found to move thourgh a distance y on the scale.The angle `theta` is given by

A

`y/(2x)`

B

`y/x`

C

`x/(2y)`

D

`x/y`

Text Solution

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The correct Answer is:
A
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