Make Doppler Effect Demonstrators
by hjhutchinson in Teachers > 10
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Make Doppler Effect Demonstrators
This easy to make demonstrator can be made 2 ways. Attach a string and swing it in circles or throw to others to show the effect of perceived frequency when objects are moving away or toward you.
Supplies
9v battery holder
6v buzzer
optional supports:
A foam ball
spare piece of foam that can be cut as needed
paper clip
string
Initial Assembly
Assemble the battery box and buzzer.
Consider Ways to Support the Buzzer
Using some foam, a support can be built for the buzzer with a space to turn it on or off. Alternatively, the foam ball can be cut and the buzzer can be inserted directly into the ball and turned on and off as needed.
To finish, attach a string to a paper clip and slide the paper clip into the foam ball. Or just throw the things around to each other! A fun demo when talking about waves and frequency.