A train blowing its whistle moves with a constant velocity v away from an observer on the ground. The ratio of the natural frequency of the whistle to that measured by the observer is found to be 1.2. If the train is at rest and the observer moves away from it at the same velocity, this ratio would be given by:
Text Solution
Verified by ExpertsThe correct answer is:
B
In the 1st case, the apparent frequency is given by
where 
is the velocity of sound.
In the second case,
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