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Lambert's law

American  

noun

Optics.

  1. the law that the luminous intensity of a perfectly diffusing surface in any direction is proportional to the cosine of the angle between that direction and the normal to the surface, for which reason the surface will appear equally bright from all directions.

Etymology

Origin of Lambert's law

After J. H. Lambert

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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