A photocell is illuminated by a small bright source placed 2 m away. When the same source…
Chemistry · JEE Main · NTA Exams — Atomic Structure
A photocell is illuminated by a small bright source placed 2 m away. When the same source of light is placed 4 m away, the electrons emitted by photo-cathode in one second :
- carry one quarter of their previous energy
- carry one quarter of their previous momentum
- are half numerous
- are one quarter numerous
Answer
(D) are one quarter numerous
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