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Malus' law

American

[muh-loos law, ma-lys] / məˈlus ˈlɔ, maˈlüs /

noun

Optics.

the law stating that the intensity of a beam of plane-polarized light after passing through a rotatable polarizer varies as the square of the cosine of the angle through which the polarizer is rotated from the position that gives maximum intensity.

Named after E. L. Malus (1775–1812), French physicist

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