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Three sound waves of equal amplitudes ha...

Three sound waves of equal amplitudes have frequencies `(v - 1), v, (v + 1)`. They superpose to give beats. The number of beats produced per second will be :

A

`3`

B

`2`

C

`1`

D

`4`

Text Solution

Verified by Experts

The correct Answer is:
B
net beat frequency
`=LCM` of individual beat frequencies
`=LCM` of `"[(n,n-1),(n,n+1),(n-1,n+1)]"`
`=LCM ` of `(1,1,2)`
`=2Hz`
So, no. of beats per second`=2`
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