Question

An observer A is in a moving vehicle with a siren on while an observer B is stationary on the side of the road.State the difference between the sound heard by A and B as the vehicle approaches B at a high constant speed

Answer 1

Explanation:

the stationary observer will hear the frequency of sound increase while the car approaches the observer and the frequency will decrease as the car goes away from observer. On the other hand, observer inside the car will hear a constant frequency of sound throughout the event.