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Doppler Ball (PY3092)


Doppler ball is a 90mm plastic ball with a PP3 battery powered tone generator and speaker inside. The ball can be safely whirled round in a large horizontal circle to demonstrate the Doppler effect. Good output volume and variable pitch provide all that is required for a dramatic demonstration of the Doppler shift associated with a moving source. PP3 battery and rotation cord supplied. Dimensions: 90mm diameter, 100g.