Optics Question 491
Question: The distance between a point source of light and a screen which is 60 cm is increased to 180 cm. The intensity on the screen as compared with the original intensity will be
[CPMT 1888]
Options:
A) (1 / 9) times
B) (1 / 3) times
C) 3 times
D) 9 times
Show Answer
Answer:
Correct Answer: A
