Question
Physics Question on Optics
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 electrons emitted by photo cathode
A
carry one quarter of their previous energy
B
carry one quarter of their previous momenta
C
are half as numerous
D
are one quarter as numerous
Answer
are one quarter as numerous
Explanation
Solution
The correct option is (D): are one quarter as numerous.