Photoelectric EffectHard
Question
A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed 
m away, the number of electrons emitted by photo cathode would
m away, the number of electrons emitted by photo cathode wouldOptions
A.decrease by a factor of 4
B.increase by a factor of 4
C.decrease by a factor of 2
D.increase by a factor of 2
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