law of Malus

noun Optics. Unabridged

Malus' law

[muh-loos; French ma-lys]
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.
Also called law of Malus, Malus cosine-squared law [koh-sahyn skwaird] .

named after E. L. Malus (1775–1812), French physicist Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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