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A photocell is illuminated by a small br...

A photocell is illuminated by a small bright source placed 1m away. When the same source of light is placed (1/2)m away, the number of electrons emitted by photocathode would

A

Decrease by a factor of 2

B

Increase by a factor of 2

C

Decrease by a factor of 4

D

Increase by a factor of 4

Text Solution

Verified by Experts

The correct Answer is:
D
No. of photo electron `prop` Intensity `prop 1/(d^2)`
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