Question

Select One Correct Option from the following: 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.
(A) The number of waves striking the surface per second $\frac{f(c+v)}{c}$.
(B) The wavelength of reflected wave is $\frac{c(c-v)}{f(c+v)}$
(C) The frequency of the reflected wave is $\frac{f(c+v)}{c-v}$
(D) The number of beats heard by a stationary listener to the left of the reflecting surface is $\frac{vf}{c-v}$

Answer 1

Answer:A

Explanation:a is the correct answer

Answer 2

Correct option is " A "................

Hope it help............!..