仕様

• Material: Borosilicate glass, MDF, others
• Size: 80 x 80 x 105 mm
• *Because they are handmade, there may be slight individual differences in the shape and size of the glass.
•  
• rotating principle
• The radiometer is an experimental instrument designed by the British physicist Crooks in the 1870s to convert solar energy into kinetic energy.
• One side of the feather in the glass is painted black. When exposed to light, the black blade surface absorbs the light and raises the temperature.
• The molecular activity of the gas near its surface increases, and the pressure caused by molecular collisions on the blade surface makes a difference from the other surface, so the blade rotates toward the unpainted surface. (The inside of the glass ball is in a semi-vacuum state.)
• Code: C 15 -6999
•