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RADIOMETER

Item Number : 03817P1

$18.95 EACH

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Item Number : 03817P2

$25.95 PKG (2)

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RADIOMETER

Another oldie but goodie. Approximately 6" tall evacuated clear glass bulb mounted in a black stand, 3" in diameter at the top. A four bladed vane is balanced on a needle inside the sphere. Because opposite surfaces of the vanes are black and white, incident radiant energy is absorbed or reflected to a different degree. The result is a spinning vane. The brighter the light, the faster it spins. Simple, but compelling. Brief explanatory instruction sheet included.

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