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Two sound sources emitting sound each of...

Two sound sources emitting sound each of wavelength `lambda` are fixed at a given distance apart. A listener moves with a velocity `u` along the line joining the two suorces. The number of beats heard by him per second is

A

`(2 u)/lambda`

B

`u/lambda`

C

`u/(3 lambda)`

D

`(2 lambda)/u`

Text Solution

Verified by Experts

The correct Answer is:
A
Number of extra waves received per second
`=u/lambda-(-u//lambda)=(2u)/lambda`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE MOTION-Exercise 2
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