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


  • 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'
  • New drug against malaria effective: Uses synchrotron light
    The CD27 drug is a true alternative against malaria, researchers now report. They have analyzed the crystalline structure of the DNA with the drug by performing X-ray diffraction experiments at the ALBA synchrotron. Read more on this news related to 'Diffraction'
  • Ames Instrument Helps Identify the First Habitable Environment on Mars, Wins Invention Award
    NASA's Ames Research Center in Moffett Field, California, has won the 2013 NASA Government Invention of the Year award for the Chemistry and Mineralogy (CheMin) X-ray diffraction instrument aboard the Mars Science Laboratory rover Curiosity. CheMin’s identification of minerals in rocks and soil is crucial to the mission's goal of assessing past environme Read more on this news related to 'Diffraction'

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