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Crookes radiometer

noun

, Optics.


Crookes radiometer

noun

  1. 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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Word History and Origins

Origin of Crookes radiometer1

First recorded in 1880–85; after Sir W. Crookes
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Example Sentences

Ditto for the Crookes Radiometer, which MoMA also just began selling.

It is a sort of differential bombardment of the gas molecules on the two faces of a dust particle somewhat analogous to the action on Mr. Crookes' radiometer vanes.

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