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Crookes radiometer

noun, Optics.
radiometer (def 1).
Origin of Crookes radiometer
First recorded in 1880-85; after Sir W. Crookes Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for Crookes radiometer

Crookes radiometer

(physics) a type of radiometer consisting of an evacuated glass bulb containing a set of lightweight vanes, each blackened on one side. The vanes are mounted on a vertical axis and revolve when light, or other radiant energy, falls on them
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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