DIFFRACTION

diffraction

(noun) when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands

Source: WordNet® 3.1

Etymology

Noun

diffraction (countable and uncountable, plural diffractions)

(quantum mechanics) The breaking up of an electromagnetic wave as it passes a geometric structure (e.g. a slit), followed by reconstruction of the wave by interference.

Source: Wiktionary

Dif*frac"tion, n. Etym: [Cf. F. diffraction.] (Opt.)

Definition: The deflection and decomposition of light in passing by the edges of opaque bodies or through narrow slits, causing the appearance of parallel bands or fringes of prismatic colors, as by the action of a grating of fine lines or bars. Remarked by Grimaldi (1665), and referred by him to a property of light which he called diffraction. Whewell. Diffraction grating. (Optics) See under Grating.

– Diffraction spectrum. (Optics) See under Spectrum.

Source: Webster’s Unabridged Dictionary 1913 Edition

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