diffraction

Definitions

  • WordNet 3.6
    • n diffraction when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands
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Webster's Revised Unabridged Dictionary
    • n 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 ."
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Century Dictionary and Cyclopedia
    • n diffraction In optics, the spreading of light or deflection of its rays, accompanied by phenomena of interference: occasioned by the neighborhood of an opaque body to the course of the light, as when it passes by the edge of an opaque body or through a small aperture, the luminous rays appearing to be bent or deflected from their straight course and mutually interfering with one another. See interference.
    • n diffraction Thus, if a beam of monochromatic light is passed through a narrow slit and received on a screen in a dark room, a series of alternately light and dark bands or fringes is seen, which diminish in intensity and distinctness on either side of the central line; if white light is employed, a series of colored spectra of different orders is obtained. Similar phenomena of diffraction are obtained from diffraction gratings, which consist of a band of equidistant parallel lines (from 10,000 to 30,000 or more to the inch), ruled on a surface of glass or of polished metal; the spectra obtained by this means are called interference or diffraction spectra. They differ from prismatic spectra, since in them the colors are uniformly distributed in their true order and extent according to their difference in wave-length; while in the latter the less refrangible (red) rays are crowded together, and the more refrangible (blue, violet) are dispersed. Diffraction gratings are now much used, especially in studying the solar spectrum. The best gratings are ruled on speculum metal with a concave surface (often called Rowland gratings, after Professor Henry A. Rowland of Baltimore), and give an image of the spectrum directly, without the intervention of a lens.
    • n diffraction Hence In acoustics, the analogous modification produced upon sound-waves when passing by the edge of a large body, as a building. The chief difference between the two classes of phenomena is due to the relatively enormous length of the waves of sound, as compared with those of light.
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Chambers's Twentieth Century Dictionary
    • n Diffraction a name for certain phenomena connected with light passing through a narrow opening or by the edge of an opaque body: the spreading of the rays, with interference phenomena, coloured and other
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Etymology

Webster's Revised Unabridged Dictionary
Cf. F. diffraction,
Chambers's Twentieth Century Dictionary
L. diffringĕre, diffractumdis, asunder, frangĕre, to break.

Usage

In literature:

These diffractive spectra have been examined with great skill by Draper and Langley.
"Six Lectures on Light" by John Tyndall
The spectroscope is the improved instrument by which the diffracting prism is best employed in producing the spectrum.
"Notable Events of the Nineteenth Century" by Various
In 1799 he was induced by his fellow-student, Henry Brougham, to study the diffraction of light.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3" by Various
The modern diffraction grating is a truly wonderful piece of work.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
Diffracted: bending in different directions.
"Explanation of Terms Used in Entomology" by John. B. Smith
C. When in focus the central disc is surrounded by an intermittent diffraction pattern, i.e.
"On Laboratory Arts" by Richard Threlfall
The diffraction of light revealed itself to Young in the hues of a soap-bubble.
"The History of Dartmouth College" by Baxter Perry Smith
The Roentgen rays cannot be reflected by reflecting surfaces, concentrated by lenses, or refracted or diffracted.
"Little Masterpieces of Science:" by Various
Intermediate cases in which a few zones only are formed belong especially to the province of diffraction.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
He took the spectrum produced by diffraction instead of refraction, and measured that.
"The Telephone" by A. E. Dolbear
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In news:

In the background, the central portion of a diffraction-limited image taken in 2012 is displayed.
Moving Laser Diffraction from the Lab to the Production Process.
Moving Laser Diffraction Particle Sizing from the Lab to the Process.
We would like to use dry analysis on our laser- diffraction system, but the particles are fragile and we're struggling to get robust results.
Suppliers of products ranging from balances and blenders to X-ray diffraction instruments are listed, along with contact information.
An experienced concrete petrographer and clinker microscopist , he is also proficient in the use of scanning electron microscopy and X-ray diffraction.
The simplest way to do this is with some type of diffraction grating.
Items Tagged with ' x-ray diffraction '.
Articles Tagged with " x-ray diffraction ".
Downloadable pdf of Chapter 14 New Method to Study Molecular Interactions in Fats—Synchrotron Radiation Microbeam X-ray Diffraction from the book Cocoa Butter and Related Compounds.
W CONSHOHOCKEN, PA- X-ray diffraction has become a popular means of residual stress measurement in the aerospace materials field over the last 50 years.
RESEARCHERS in Italy who examined a lens from Galileo 's telescope with modern interferometric equipment say they found an extraordinarily low level of diffraction, reflecting a high level of craftsmanship.
MEMS Optical is a supplier and manufacturer of both refractive (microlens arrays) and diffractive (beam shapers and beam splitters) micro optics and of MEMS devices such as scanning tilt micro mirrors and deformable mirrors.
From Watson and Crick to today's molecular biologists, researchers rely on X-ray diffraction images to deduce information about of the molecules of life.
Diffractive light reflecting foils Kurz Transfer Products Charlotte NC USA Lenses are diffractive light reflecting foils that display lens patterns and create the illusion of depth.
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In science:

Principal maxima are labeled according to their diffraction order n and the color shadowed regions denote for which the peak-area intensities are computed. (b) Peak-area intensities associated with the diffraction orders n = 0 (blue line) and n = +1 (red line).
Determining final probabilities directly from the initial state
We can determine the lattice depth experienced by the atoms by measuring how the diffraction pattern changes as we vary the length of the Bragg diffraction pulses.
An apparatus for immersing trapped ions into an ultracold gas of neutral atoms
X-ray diffraction studies of EuTiO3 single crystal were performed with four-circle kappa diffractometer Gemini of Oxford Diffraction (now Agilent Technologies), equipped with CCD detector Atlas.
Antiferrodistortive phase transition in EuTiO3
FIG. 4: Room-temperature 310 powder diffraction peak of the A and B ceramics compared with the same diffraction peak of grinded single crystal.
Antiferrodistortive phase transition in EuTiO3
Our X-ray and electron diffractions do not support the orthorhombic structure, but one should admit, that our electron diffraction measurement was not performed below room temperature.
Antiferrodistortive phase transition in EuTiO3
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