A band playing music at a frequency f is moving towards a wall at a speed v b . A motorist is following the band with a speed v m . If v is the speed of sound, obtain an expression for the beat frequency heard by the motorist.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
.....(1)
.....(2)
Frequency received in case 1
f 1 = f 
and in case 2 f 2 = f 
Obviously f 2 > f 1
∴ Beat frequency f b = f 2 – f 1 = f 
– f 
or f b = 
f
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