Suppose that the speed of sound in air ...

Suppose that the speed of sound in air at a given temperature is 400 m / sec . An engine blows a whistle at 1200 H z frequency. It is approaching an observer at the speed of 100 m / sec . What is the apparent frequency as heard by the observer

600 Hz

1200 Hz

1500 Hz

1600 Hz

Text Solution

Verified by Experts

The correct Answer is:

`f.=f((v)/(v-v_(s)))=1200((400)/(400-100))=f.=1600Hz`

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