Question

A sound wave of frequency f travels horizontally to the right. It is reflected from a large vertical plane surface moving to left with a speed v. The speed of sound in medium is c. Then(a) the number of wave striking the surface per second is $f\frac{(c+v)}{c}$(b) the wavelength of reflected wave is $\frac{c(c+v)}{f(c+v)}$(c) the frequency of the reflected wave is $f\frac{(c-v)}{(c-v)}$(d) the number of beats heard by a stationary listener to the left of the reflecting surface is $\frac{vf}{c-v}$

Answer 1

The answer of u r question is

Option.A

Answer 2

Answer:

The answer is A) the number of wave striking the surface per second....