Question
a source of sound of frequency f emits sound wave with speed v is at rest. if an observer is moving towards source with speed Vo(V not), then wavelength of sound waves observed by the observer will be
(1) v/f
(2) (v - Vo)/f
(3) [v(v - Vo)]/[f(v + Vo)]
(4) [v(v + Vo)]/[f(v - Vo)]
Joshi sir comment
since velocity and frequency are changing proportionally so wavelength will be constant = v/f