Crookes radiometer

Origin of Crookes radiometer

First recorded in 1880–85; after Sir W. Crookes
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British Dictionary definitions for crookes radiometer

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
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