total reflection: Meaning and Definition of

to'tal reflec'tion

Pronunciation: [key]
? Optics. Optics.
  1. the effect that occurs when light meets the interface between the medium in which it is traveling and a medium of smaller refractive index at an angle of incidence greater than the critical angle, all light being reflected back to the first medium. Also called total internal reflection.
Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease.