Questions
An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency
a
5%
b
20%
c
Zero
d
0.5%
detailed solution
Correct option is B
When observer moves towards stationary source then apparent frequency n'=v+vOv n=v+v/5v n=65n=1.2nIncrement in frequency = 0.2 n so percentage change in frequency = 0.2nn×100 = 20%.Talk to our academic expert!
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An observer is moving towards the stationary source of sound, then
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