A sound source moves at a constant velocity. A listener is standing at a distance L away from it. Given that the source moves in a straight line at a right angle to the listener and starts closest to the listener (ie at t=0) deduce an expression for the frequency heard by the listener in relation to time.
where l is listener and s is source
The Attempt at a Solution
It's obviously Doppler effect related.
So far I’ve done T=1/fs
But unsure how to get L into the equation.
Surely VT is the distance travelled by the wave and vsT is λs. Is there any orientation where L can be introduced? Or is this version correct?