4 Blades Rotating Glass Windmill Solar Powered Crookes Radiometer Light3843

The vanes are polished or white on one side and black on the other. When exposed to sunlight, artificial light, or infrared radiation (even the heat of a hand nearby can be enough), the vanes turn with no apparent motive power, the dark sides retreating from the radiation source and the light sides advancing.

Condition: New · Seller: fashionstyle6 · 99.3% positive · 114981 ratings

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