Radiometer - Impress the In-Laws...Leave it by a Window* Type:TEDCO Demonstrates buoyancy

Demonstrates buoyancy

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Caution:  Made of glass

the Nite GlowRing will emit light for many years

Radiometer - Impress the In-Laws...Leave it by a Window* Type:TEDCO Demonstrates buoyancyExperience a classic Crookes radiometer for yourself! The metal inside the sealed glass will spin when exposed to strong light. Leave it by a window on a sunny day the stronger the light, the faster it spins! Why does it turn you ask? Well, in case anyone asks, a common myth (one originally held even by the scientist who invented it in 1873, Sir William Crookes) is that the momentum of the absorbed light on the black faces makes the radiometer