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`

Options

A. The frequency of the reflected wave is `(v(c+v))/(c-v)`
B. The wavelength of the reflected wave is `(c(c-v))/(v(c+v))`
C. The number of waves striking the surface per second is `(v(c+v))/(c)`
D. The number of beats heard by a stationary listener to the left of the reflecting surface is `(v v)/(c-v)`

Answer

A, B, C