Through the light can be turned on their own, through the cold wind can also be turned to the opposite direction, when the light of the black surface absorption of heat energy, white leaf release heat energy, you can promote the four leaf rotation. The total height of the product is 130mm, the width of the plastic base is 90mm, the diameter of the glass bulb is 80mm, and the product is all made of glass.
Crookes Radiometer
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