1.

A sound wave of frequency f travels horizontally to the right. It is reflected from a large verticalplane surface moving to the left with a speed v. The speed of sound in the medium is c, then

Answer»

The FREQUENCY of the reflected WAVE is a `(f(c + v))/(c - v)`
The wave LENGTH of the reflected wave is `(c(c - v))/(f(c + v))`
The number of waves striking the surface per second is `(f(c + v))/(c ) `
The number of beats heard by a stationary listener to the left of the reflecting surface is `(FV)/(c - v)`

Answer :A::B::C


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