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Characteristics of Sound Waves

Bullet train ...

Question

Bullet train in japan travels with 1.2 Mach. A man standing on the platform will hear the frequency as if the train blows a whistle of 800 Hz while approaching the station.

A

800 Hz

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B

960 Hz

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C

1960 Hz

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D

none of these

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Solution

The correct option is C 800 Hz
Observer will listen the original frequency, as train itself is moving more than the velocity of sound will not make any change in the observed frequency. Option 'A' is correct.

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