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Two tuning forks with natural frequencie...

Two tuning forks with natural frequencies 340 Hz each move relative to a stationary observer. One fork moves away from the observer, while the other moves towards the observer at the same speed. The observer hears beats of frequency 3 Hz. Find the speed of the tuning forks (speed of sound is `340(m)/(s)`).

Text Solution

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If speed of tuning for is u,
`Deltaf=f_(A)-f_(R)=f|(2u)/(V)|=3( :.u lt lt V)`
`i.e, u=(V)/(2)[(Deltaf)/(f)]=(340)/(2)[(3)/(340)]=1.5 m//s`
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