Doppler Tennis Ball
![Tennis ball connected to a rope](/media/libraries/college-of-science-and-engineering/physics/images/demo-images/waves/20220817_132507.jpg)
PIRA: 3B40.15
Materials: String, Doppler Tennis Ball
This demo is a good way to show the doppler effect to the class by swinging a tennis ball with a buzzer in it. Swinging it will allow students to hear the pitch difference as the ball approaches and moves away from them.