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Radiometer

$18.20
Availability: In stock
Brand Tedco
Part Number 01800
UPC 043067018007
Package Dimensions 5.11999999478 in x 3.45999999647 in x 7.16999999269 in, 0.24912235606 lb
EAN -
It's the spear powered by the sun! When light strikes the diamond wings it tranfers 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.