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A caesium photocell, with a steady poten...

A caesium photocell, with a steady potential difference of 60 V across it, is illuminated by a bright point source of light 50 cm away. When the same light is placed 1 m away the photoelectrons emitted from the cell

A

Are one quarter as numerous

B

Are half as numerous

C

Each carries one quarter of their previous momentum

D

Each carries one quarter of their previous energy

Text Solution

Verified by Experts

The correct Answer is:
A
No. of photon electron `prop ` Intensity `1/d^2`
`implies N_1/N_2=(d_2/d_1)^2impliesN_2=N_1/4`
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