ordinary ray

(redirected from ordinary rays)
Also found in: Dictionary.
Related to ordinary rays: Extraordinary ray, double refraction

ordinary ray

[′ȯrd·ən‚er·ē ′rā]
(optics)
One of two rays into which a ray incident on an anisotropic uniaxial crystal is split; it obeys the ordinary laws of refraction, in contrast to the extraordinary ray. Also known as O ray.