Diffraction

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Dictionary Meaning and Definition on 'Diffraction'

Diffraction Meaning and Definition from WordNet (r) 2.0
    diffraction n : when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands
Diffraction Meaning and Definition from Webster's Revised Unabridged Dictionary (1913)
    Diffraction \Dif*frac"tion\, n. [Cf. F. diffraction.] (Opt.) 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.
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Wikipedia Meaning and Definition on 'Diffraction'


Diffraction refers to various phenomena which occur when a wave encounters an obstacle. Italian scientist Francesco Maria Grimaldi coined the word "diffraction" and was the first to record accurate observations of the phenomenon in 1665. In classical physics, the diffraction phenomenon is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Similar effects occur when light waves travel through a medium with a varying refractive index or a sound wave through one with varying acoustic impedance. Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as visible light, x-rays and radio waves. As physical objects have wave-like properties (at the atomic level), diffraction also occurs with matter and can be studied according to the principles of quantum mechanics.

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Diffraction Sample Sentences in News


  • Sewell Gallery shows Ventura's diffracted light photography
    A collection titled "Ecotone Diffraction Art," diffracted light photography, by local artist George Ventura will be on exhibit from next Wednesday through Aug. Read more on this news related to 'Diffraction'
  • Particle Size Analysis Market by Technology (Laser Diffraction, Dynamic Light Scattering, Imaging, Coulter Principle ...
    LONDON, July 22, 2014 /PRNewswire/ -- Reportbuyer.com has added a new market research report: Particle Size Analysis Market by Technology (Laser Diffraction, Dynamic Light Scattering, Imaging, Coulter ... Read more on this news related to 'Diffraction'
  • Lensless imaging breakthrough with table-top soft-X-ray source promises laboratory-friendly ultra-high resolution ...
    The overwhelming majority of past and present imaging systems use a lens to focus the subject of interest, even today's super-resolution light microscopes that breach the diffraction limit through ingenious experimental methods. Read more on this news related to 'Diffraction'

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