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An observer is approaching a stationary ...

An observer is approaching a stationary source with a velocity `1/4` th of the velocity of sound. Then the ratio of the apparent frequency to actual frequency of source is

A

`4 : 5`

B

`5 : 4`

C

`2 : 3`

D

`3 : 2`

Text Solution

Verified by Experts

The correct Answer is:
B
When an observer is moving towards the source apparent frequency,
`n'=nxx((v+v_(o))/v)=n xx ((v+v//4)/v)=nxx5/4 implies (n')/n=5/4`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE MOTION-Exercise 2
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