Questions
A photo cell is illuminated by a small bright source placed one metre away.When the same source of light is placed two metres away, the electron emitted by the photo cathode
a
Each carries quarter of its previous energy
b
Each carries quarter of its previous momenta
c
Are half as numerous
d
Are one quarter as numerous
detailed solution
Correct option is D
Light intensity is inversely proportional to square of the distanceTalk to our academic expert!
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