RADIOMETER

Item Number : 03817P1

$ 13.95各

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Item Number : 03817P2

$ 23.95 PKG(2)

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辐射计

另12博官网老人但好好说。 5." high 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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