# diffraction

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## diffraction

[dĭ-frak´shun]
the bending or breaking up of a ray of light into its component parts.

## dif·frac·tion

(di-frak'shŭn),
Deflection of the rays of light from a straight line in passing by the edge of an opaque body or in passing an obstacle of about the size of the wavelength of the light.
[L. dif- fringo, pp. -fractus, to break in pieces]

## diffraction

/dif·frac·tion/ (dĭ-frak´shun) the bending or breaking up of a ray of light into its component parts.

## diffraction

[difrak′shən]
Etymology: L, dis, opposite of, frangere, to break
the bending and scattering of wavelengths of light or other radiation as the radiation passes around obstacles or through narrow slits. X-ray diffraction is used in the study of the internal structure of cells. See also refraction.

## dif·frac·tion

(di-frak'shŭn)
Deflection of the rays of light from a straight line in passing by the edge of an opaque body or in passing an obstacle of about the size of the wavelength of the light.
[L. dif- fringo, pp. -fractus, to break in pieces]

## diffraction

Deviation of the direction of propagation of a beam of light, which occurs when the light passes the edge of an obstacle such as a diaphragm, the pupil of the eye or a spectacle frame. There are two consequences of this phenomenon. First, the image of a point source cannot be a point image but a diffraction pattern. This pattern depends upon the shape and size of the diaphragm as well as the wavelength of light. Second, a system of close, parallel and equidistant grooves, slits or lines ruled on a polished surface can produce a light spectrum by diffraction. This is called a diffraction grating. See Airy's disc; diffraction fringes; Maurice's theory.

## diffraction

the bending or breaking up of a ray of light into its component parts.

x-ray diffraction
a method used to determine the three-dimensional structure of the single object, e.g. protein molecule, that composes the crystal. Based on recording and analyzing the diffraction pattern of an x-ray beam passing through a crystalline structure, either organic or inorganic.
References in periodicals archive ?
From the figure, it is found that the acoustic wave in seismic data is specially developed and the diffraction of the breakpoint is not identified.
Based on the principle of prestack diffraction migration, the contrastive study is carried out with diffraction of the breakpoint and the channel wave (Roslee et al.
The lateral variation range of breakpoint of diffraction is about 2 m, and the wave group of diffraction is short and high resolution, and imaging position of breakpoint of small fault is in accordance with the actual model, and the direction of breakpoint in full space is easily computed by polarization migration (Wang et al.
Diffraction Characteristics of Small Fault ahead of tunnel face in coal roadways.
The highlights challenging experiments on samples, such as those producing a low number of diffraction spots, which can now be mapped by using magnifying optics in the diffracted X-ray beam path.
Two and three dimensional detectors, which can simultaneously record diffraction rings and positions, provide advanced texture analysis and mapping of microstructure.
At ANSTO, Liss has developed the concept of the materials oscilloscope, in which two-dimensional diffraction rings are captured in real time; creating a movie while a specimen undergoes thermo-mechanical treatment.
The geometrical optics method is briefly reviewed in Section 2, followed by a detailed description of the Uniform Theory of Diffraction in Section 3.
Depending on the geometry of the problem, UTD can provide other diffraction mechanisms (slope diffraction, equivalent current contribution) to increase the prediction accuracy.
Since the UTD is an extension of Geometrical Optics used to describe diffraction phenomena, we will first briefly review the Geometrical Optics fields of a conical horn mounted on an infinite ground plane.
GEOMETRICAL THEORY OF DIFFRACTION FOR AN EDGE ON A PERFECTLY CONDUCTING SURFACE
A single strong diffraction was found in WAXD patterns for all the samples under study, indicating that nylon 11 11 crystallizes into the [gamma]-form from melt independent of crystallization temperature.

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