Dual Nature Of Light Question 370
Question: A photoelectric cell is illuminated by a point source of light 1m away. When the source is shifted to 2m then
Options:
A) number of electrons emitted is a quarter of the in ideal number
B) each emitted electron carries one quarter of the initial energy
C) number of electrons emitted is half the initial number
D) each emitted electron carries half the initial energy
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Power $ \propto $ No. of electrons emitted (N) $ P\propto \frac{1}{r^{2}}\Rightarrow N\propto \frac{1}{r^{2}} $
BETA
