1006 Hanging Radiometer Clear


Shipping to United States: $15.00


Size: 7 inch diameter / 3 inches diameter

The Radiometer is an invention of the English Physicist Crookes and shows vividly the conversion of light into kinetic energy. The black surface of the solar wing-wheel (a circle of elements which are sensitive to light) absorbs much more light energy than the bright one. Because of the stronger heating of the air molecules on the black surface, a higher pressure arises there that leads to a rotary motion of the solar wings. The rotary force on the solar wing-wheel must be higher than the resistance of the air molecules, a partial vacuum is generated in the ball.

This rotary motion is the result of the light incidence and as well as possible in a lit room (except for cold neon light).

The more intensive the light is, the faster the solar wheel moves. This demonstration model shows how light is transformed into kinetic energy. The radiometer may be called a small solar power station.

Reviews (4)


So gorgeous. I love it. Calming meditative and relaxing. Arrived safely packaged perfectly.

Shipped and delivered before expected! Beautifully packaged and beautiful item!

Beautiful product! Great seller and super fast shipping.

It wasn't really revealed what the size of this was until it was purchased. It was delivered promptly. But it was shipped in a rather flimsy box, I was very surprised that it arrived here unbroken. It's so small, I don't feel that I'm getting the value for my money.