When a beam of → unpolarized light is incident on a
→ doubly refracting crystal, there will be two refracted rays.
The ray for which → Snell's law does not hold.
→ extraordinary; → ray.
The ray that has an → isotropic speed in a
→ doubly refracting crystal.
It obeys → Snell's law
upon refraction at the crystal surface.
See also → extraordinary ray
→ ordinary; → ray.
© 2005-2020 by M. Heydari-Malayeri