When exposed to sunlight or artificial light, the rotor turns inside this
sealed glass bulb.
The rotor has four vanes that are mounted on a
Each vane has one blackened side and one
The rotor turns because of the differential
heating of the black and silvered vanes.
Use this product as an
attention-getter that will inspire discussions about heat, light, and solar
Dimensions of the Radiometer are 6" tall by 4" in diameter.