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A photocell is illuminated by a small br...

A photocell is illuminated by a small bright source places `1` m away when the same source of light is placed `(1)/(2)` m away. The number of electron emitted by photocathode would be

A

increases by a factaor of 2

B

decrease by a factor of 2

C

increase by a factor of 4

D

decrease by a factor of 4

Text Solution

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The correct Answer is:
3
`Ialpha(1)/(r^(2))`
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NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 1 (C.W)
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  11. The momentum of a photon of energy will be

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