wave_mechanics progressive_waves Question 9
Question: If amplitude of waves at distance r from a point source is A, the amplitude at a distance 2r will be
[MP PMT 1985]
Options:
A) 2A
B) A
C) A/2
D) A/4
Show Answer
Answer:
Correct Answer: C
Solution:
$ I\propto A^{2}\propto \frac{1}{d^{2}} $
Therefore $ A\propto \frac{1}{d} $
BETA
