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A police siren emits a sound wave of fre...

A police siren emits a sound wave of frequency 440 Hz. The speed of sound is 332 m/s. if the siren is moving away from the listerner with a speed of 18 m/s relative to the air and the listerner is moving towards the siren with a speed of 68 m/s relative to the air, then what frequency does the listern hear?

Text Solution

Verified by Experts

`v=((V+V_(L))/(V+V_(S)))v_(0)`
`=((332+68)/(332+18))xx440`
`=(400)/(350)xx440=502.86Hz`
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