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extraordinary ray

noun

, Optics, Crystallography.
  1. the part of a doubly refracted ray that has changed speed and vibrations in the principal plane of the crystal.


extraordinary ray

noun

  1. 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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Word History and Origins

Origin of extraordinary ray1

First recorded in 1870–75
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Example Sentences

Now the refractive index of Iceland spar is, for the extraordinary ray less, and for the ordinary greater, than for Canada balsam.

The extraordinary ray, produced by the double refraction of the ordinary ray, o.

The extraordinary ray, produced by the double refraction of the extraordinary ray, e. o o.

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