Question

Speed of sound wave is v. If a reflector moves towards a stationary source emitting waves of frequency f with speed u, the wavelength of reflected wave will be:

• A. $\frac{v - u}{v + u}f$
• B. $\frac{v + u}{v}f$
• C. $\frac{v + u}{v - u}f$
• D. $\frac{v - u}{v}f$

Answer 1

Answer: (C)

$\frac{v + u}{v - u}f$

Answer 2

Do yourself