Dual Nature Of Light Question 337
Question: A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed $ \frac{1}{2}m $ away, the number of electrons emitted by photo cathode would [CBSE PMT 2001; AIEEE 2005]
Options:
A) Decrease by a factor of 2
B) Increase by a factor of 2
C) Decrease by a factor of 4
D) Increase by a factor of 4
Show Answer
Answer:
Correct Answer: D
Solution:
Number of photoelectrons µ $ \frac{1}{{{(Distance)}^{2}}} $ .
BETA
