Vacuum Solar Radiometer Wind Solar windmill- Glass Decoration Home Car(Green)
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<b>[Product Information]</b><br>
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<li>Demonstrates that light can produce force on dark colored surfaces</li>
<li>Four square panels / vanes are mounted on a rotating shaft in an evacuated glass tube / bulb</li>
<li>One side of each vane is black; the other side is silver</li>
<li>Direct light pushes on the black sides, causing the wind vane to rotate</li>
<li>Glass base for stability</li>
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