A sound wave of frequency v travels horizontally to the right. It is reflected from a large vertical plane surface moving to left with a speed u. The speed of sound in medium is c.
A
The number of waves striking the surface per second is 
v
v
B
The wavelength of reflected wave is 
C
The frequency of the reflected wave as observed by the stationary observer is v 
D
The number of beats heard by a stationary listener to the left of the reflecting surface is 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION
(a, b, c)
By the concept of doppler effect Apparent frequency (no. of waves) striking the wall = 
= 
frequency of reflected wave (wall become source) 
Apparent wavelength = 
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