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A photo cell is illuminated by a small b...

A photo cell is illuminated by a small bright source placed 1 m away. When the same source of light is placed 2 m away. The true statement about the electrons emitted by the photo cathode is

A

Each carry one quarter of their previous energy

B

Each carry one quarter of their previous momenta

C

Are half as numerous

D

Are one quarter as numerous.

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