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half-wave plate

[ haf-weyv, hahf- ]
/ ˈhæfˌweɪv, ˈhɑf- /
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noun Optics.
a crystal thin enough to cause a phase difference of 180° between the ordinary and extraordinary rays of polarized light, thereby changing the direction of the plane of polarization.
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Origin of half-wave plate

First recorded in1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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