Crookes radiometer

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Crookes radiometer

n
(General Physics) 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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Noun1.Crookes radiometer - electromagnetic radiometer consisting of a small paddlewheel that rotates when placed in daylight
radiometer - meter to detect and measure radiant energy (electromagnetic or acoustic)
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