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extraordinary ray

noun, Optics, Crystallography.
the part of a doubly refracted ray that has changed speed and vibrations in the principal plane of the crystal.
Origin of extraordinary ray
1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for extraordinary-ray

extraordinary ray

(optics) the plane-polarized ray of light that does not obey the laws of refraction in a doubly refracting crystal Compare double refraction, ordinary ray
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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