Question

A listener moves towards stationary sound source with a constant speed and crosses it then the correct graph between Apparent frequency with time is please explain

Answer 1

So in the above solution we get,

• when the observer approaches a wave source: f ' = f + Δf --- a higher frequency (And this value is constant)
• when the observer recedes from a wave source: f ' = f - Δf --- a lower frequency (And this value is constant)

So graph is,