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Solar Radiometer

$53.00
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Product Description

Solar Radiometer

Sir William Crookes 1873 / Kikkerland 2017

Glass, Metal, Wood, ABS

[H 4.25"]

This science fiction gadget spins its pinwheels in sunlight. No batteries needed.

The Crookes Radiometer consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity. Today the device is mainly used in physics education as a demonstration of a heat engine run by light energy.

 

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