A fast train moving at 40 m/s passes by a stationary observer, emitting a whistle of frequency 300 Hz. If the velocity of sound waves is 340 m/s, then the change in the apparent frequency of the sound, just before and just after the train passes by the observer, will be nearly –
Text Solution
Verified by ExpertsThe correct answer is:
C
Using the Doppler effect formula:
Where:
(speed of sound)
(speed of train)
For approaching: 
For receding: 
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