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PURPOSE: To demonstrate the Doppler effect.
DESCRIPTION: A ball that emits a high-pitched squeal 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: Click here to hear a song about the doppler effect, performed by the a capella choral group AstroCapella.
REFERENCES: Available. (PIRA 3B40.10)
EQUIPMENT: Doppler ball on string.
SETUP TIME: 10 minutes.
