Would the Doppler Effect still apply in an observers reference frame if the observer would be the one moving past the ambulance instead of the ambulance moving (relative to the air)?

Question

Would the Doppler Effect still apply in an observers reference frame if the observer would be the one moving past the ambulance instead of the ambulance moving (relative to the air)?

In: Physics

Answer 1

In the observer’s reference frame, the observer does not move. To the observer, the ambulance (and everything else in the world including the ground) is moving.