A source of sound having frequency 300 Hz and a receiver are located along the same line normal to the wall as shown in the figure. Both the source and the receiver are stationary and the wall recedes from the source with a velocity of 20 m s -1 . If the beat frequency registered by the receiver is 
Hz, then what is the value of x? [velocity of sound = 330 m s -1 ]
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION
(7)
As ; 
(for direct sound)
Now for reflected sound 
If b is the beat frequency,
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