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ordinary ray

noun
1.
Optics, Crystallography. the part of a doubly refracted ray whose velocity within a crystal is the same in any direction.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ordinary-ray

ordinary ray

noun
1.
the plane-polarized ray of light that obeys the laws of refraction in a doubly-refracting crystal Compare double refraction, extraordinary ray
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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