TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

EXTRAORDINARY INDEX [2 records]

Record 1 1990-04-17

English

Subject field(s)
  • Optics

French

Domaine(s)
  • Optique
DEF

Indice de réfraction qui varie en fonction de l'angle formé par la direction de propagation de la lumière et l'axe optique du cristal.

Spanish

Campo(s) temático(s)
  • Óptica
Save record 1

Record 2 1979-02-19

English

Subject field(s)
  • Optics
DEF

The index of refraction of the extraordinary wave propagating in a direction perpendicular to the optical axis of a uniaxial crystal.

DEF

index of refraction: the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it passes from one into the other (...)

DEF

extraordinary wave: Component of electromagnetic radiation propagating in an anisotropic uniaxial crystal whose electric displacement vector lies in the plane containing the optical axis and the direction normal to the wave front; it gives rise to the extraordinary ray.

French

Domaine(s)
  • Optique
CONT

Dans un cristal anisotrope, il existe à chaque fréquence [de la lumière incidente], deux valeurs de l'indice de réfraction: l'indice "ordinaire" et l'indice "extraordinaire". Le premier (...) ne dépend pas de la direction de propagation; par contre, l'indice extraordinaire varie entre deux valeurs extrêmes (...) en fonction de l'angle que forment la direction de propagation de la lumière et l'axe optique du cristal.

OBS

indice de réfraction: rapport constant entre le sinus de l'angle d'incidence et le sinus de l'angle de réfraction, dans un même milieu.

Spanish

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