Products featured include solar engine radiometer. Ginsberg Scientific 7-1113 Radiometer a fun vivid way to demonstrate heat transfer! the wings in the radiometer are alternately dark and light. when the light strikes the wings it transfers heat to each one but not at the same degree. the light wings reflect the ray and the dark wings absorb the rays. as the light gets brighter it creates more heat and spins the wings faster. (7 x 3.4 x 5) Creative Motion 11375-0 Radiometer measures w:3.5" h:4.72" d:3.54" the sun or light makes it run. this fascinating radiometer spins from the heat of the sun. the vanes in the radiometer are dark and light in color. the dark vanes absorb the rays the light vanes reflect the rays. Radiometer You have seen them on the science shows and marveled at them in museums, and now you can own one too. The Radiometer is a glass bulb with four suspended vanes inside. The vanes are blackened on one side, and they rotate when exposed to strong light. Just place the bulb in the sun, or next to a lamp, or any other healthy light source, and watch the vanes spin faster and faster according to the light?s intensity. No batteries are required - the light makes it go! Learn the mysteries of light, mechanical, and heat energy (but most of all have FUN) with the amazing Radiometer. This page created and maintained by www.jarusa.com. © www.jarusa.com 1999-2005.