Current price $4.80
Listing type Chinese
Location Kissimmee, Florida 347** US
Quantity sold 1
Quantity available 1
Seller wendnorto_0 (4)
Seller rating 100% positive feedback
Brand Duro-Lite Lighting
Recommended Age Range Ages 8 & up
Excellent Fun for Kids! Educational Solar Powered Radiometer. Condition is New.
* Vanes in the Radiometer are alternately dark and light in color
* Vanes transfer heat to each one but not at the same degree
* Lighter vane reflects the rays and the darker vane absorbs the rays
* For ages 8 and above-instructions included
It's the spear powered by the sun! When light strikes the diamond wings it transfers heat to each one, but not to the same degree. The light wing reflect the rays and the darker wing absorbs the rays. The stronger the light the more energy there is to heat up the darker side causing the wings to spin faster. Purchased this on a NASA school outing, never used.
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