Fresnel theory of double refraction

Fresnel theory of double refraction

[frā′nel ‚thē·ə·rē əv ‚dəb·əl ri′frak·shən]
(optics)
The theory which explains double refraction of a crystal in terms of nonspherical wave surfaces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.