Sound WavesEasy
Question
A sound wave of frequency f travels is horizontally to the right. If it is reflected from a large vertical plane surface moving to left with a speed v. The speed of sound in medium is c
Options
A.The number of wave striking the surface persecond is f 
B.The wavelength of reflected wave is f 
C.The frequency of reflected wave is f 
D.The number of beats heard by a stationary listener to the left of the reflecting surface is 
Solution
Moving plane is like a observer. Therefore, number of waves encountered by moving plane,
f1 = f
Frequecy of reflective wave,
f2 = f1
Wavelength of reflected wave,
λ =
f1 = f
Frequecy of reflective wave,
f2 = f1
Wavelength of reflected wave,
λ =
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