3B40.10.HTML
3B40.10: DOPPLER BALL

PURPOSE: To demonstrate the Doppler effect.

DESCRIPTION: A ball with a 3000 Hz whistle inside is hooked to the end of a cord and whirled about the instructor's head or thrown from person to person. The Doppler effect can easily be heard throughout even a large room.

SUGGESTIONS:

REFERENCES: A softer alternative is 3B40.11: DOPPLER EFFECT - TUNING FORK ON STRING.

EQUIPMENT: Doppler ball on string.

SETUP TIME: None.


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