Matter

Radiometer

A classic demonstration that light contains energy. Black and white vanes are enclosed within a 99% evacuated glass globe. When exposed to light, vanes spin at different speeds, depending on the intensity of the light. 5" high.
Radiometer
A classic demonstration that light contains energy. Black and white vanes are enclosed within a 99% evacuated glass globe. When exposed to light, vanes spin at different speeds, depending on the intensity of the light. 5" high.