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Definition of Diffraction

Babylon English Dictionary

process of breaking up or bending waves (especially light or sound waves)
Diffraction Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
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.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

\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.
grating. (optics) see under grating.
spectrum. (optics) see under spectrum.

  similar words(3) 

 diffraction spectrum 
 x-ray diffraction 
 diffraction grating 
WordNet 2.0

1. when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands
(hypernym) optical phenomenon
(hyponym) X-ray diffraction
(derivation) diffract
Diffraction Definition from Science & Technology Dictionaries & Glossaries
General Chemistry Glossary
 Say it 
Compare with effusion .The ability of a wave to bend around the edges of obstacles or holes. The effect is most noticeable when the obstacle or hole is comparable to the size of the wavelength .
Telecommunication Standard Terms
The deviation of an electromagnetic wavefront from the path predicted by geometric optics when the wavefront interacts with, i.e. , is restricted by, a physical object such as an opening (aperture) or an edge. (188 ) Note: Diffraction is usually most noticeable for openings of the order of a wavelength. However, diffraction may still be important for apertures many orders of magnitude larger than the wavelength.
RF Electronics
The process whereby RF signals or sound waves are, in certain circumstances, deflected from their normal straight-line path by physical objects.
The result of light waves interfering with other after passing through a narrow aperture, causing them to bend or spread.
Mineralogy Database
Powder X-ray Diffraction (XRD) is one of the primary techniques used by mineralogists and solid state chemists to examine the physico-chemical make-up of unknown solids. This data is represented in a collection of single-phase X-ray powder diffraction patterns for the three most intense D values in the form of tables of interplanar spacings (D), relative intensities (I/Io), and mineral name.
The XRD technique takes a sample of the material and places a powdered sample in a holder, then the sample is illuminated with x-rays of a fixed wave-length and the intensity of the reflected radiation is recorded using a goniometer. This data is then analyzed for the reflection angle to calculate the inter-atomic spacing (D value in Angstrom units - 10-8 cm). The intensity(I) is measured to discriminate(using I ratios) the various D spacings and the results are to identify possible matches.
Materials Science and Engineering Glossary of Terms
constructive interference of x-ray beams that are scattered by atoms of a crystal.
Fiber Optics, Optical Networking Terms
The deflecting of a light wave when it travels through an object such as a grating.
Diffraction Definition from Computer & Internet Dictionaries & Glossaries
Integrated Circuit Terminology
the spreading or bending of light that occurs when light passes around an edge.
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Diffraction Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Diffraction refers to various phenomena which occur when a wave encounters an obstacle. 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 a light wave travels through a medium with a varying refractive index, or a sound wave travels 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. Italian scientist Francesco Maria Grimaldi coined the word "diffraction" and was the first to record accurate observations of the phenomenon in 1660.

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Diffraction Definition from Religion & Spirituality Dictionaries & Glossaries
Webart Magic Astronomical Glossary
The slight bending of light rays as they pass edges, producing spurious rays and rings in telescopic images of stars.