Gladstone-Dale law

Gladstone-Dale law

[′glad·stōn ′dāl ‚lȯ]
(optics)
A law for the variation of the index of refraction n of a substance, according to which n- l is proportional to its density.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.