A photocell is illuminated by a small br...

A photocell is illuminated by a small bright source placed 1 m away .when the same source of light is placed 0.5 m away,the number of electrons emitted by photocathode would

each carry one quarter of their previous energy

each carry one quarter of their previous momenta

are half as numerous

are one quarter as numerous.

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE

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