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
First recorded in 1870–75
Words nearby extraordinary ray
British Dictionary definitions for extraordinary ray
extraordinary ray
noun
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