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for a workshop about finding extrasolar planets, I am looking for a convenient way to demonstrate Doppler shift. (An intern of mine told me how cool it was when her science teacher demonstrated it to them by driving by the school with his horn blaring -- not feasible, sorry)

The obvious thing is some sort of constant-tone noisemaker whirled around on a string - but in a small (10m/33ft) room, and with a lot of elderly docents running things, this doesn't seem like a good idea.

Of course, I could depend on their experience, but to have a concrete example would be best. Any suggestions?

Marc Taylor
Coordinator, Andrus Planetarium
Hudson River Museum
511 Warburton Avenue
Yonkers, NY 10701
(914) 963-4550 x223
Fax:  963-8558
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