If you had superhuman vision you might be able to see sound waves.
Unfortunately, the best we can do is simulate what sound waves
look like in the air. Run this simulation to help you explain
why a sound's pitch changes when an object is moving.
Do
you have a better idea of what's happening? Whether
it's a honking horn on a car, a siren on a fire truck, or a Doppler
ball being thrown in the air, the same effect is occuring in each
case...the Doppler Effect!
