# diffraction

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## diffraction

[dĭ-frak´shun]
the bending or breaking up of a ray of light into its component parts.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

## 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]
Farlex Partner Medical Dictionary © Farlex 2012

## 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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

## 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.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
The solution in the zero approximation is determining the former superposition of the transmitted and diffracted waves (two-wave approximation):
Controlling the neutron beam is necessary, as the size of this beam, together with the size of the measured diffracted beam, defines the volume of the material under study.
The diffracted power measurement showed that the replicated micromolded gratings had the same response to the IR radiation regardless of the thickness of the coating.
Phenylboronic acid derivatives in the lattice bind glucose, causing a change in charge distribution and a blue shift, -[DELTA][lambda], in the diffracted light (3).
When light strikes the hologram it is diffracted, forming a series of wavelets.
It is diffracted by the crystal structure of each material, producing a unique pattern of concentric circles, called Debye rings.
The light coming from the semiconductor laser is split into two beams, enters the scale, and is diffracted. At the time of diffraction, the scale's grating causes the phase of diffracted light beams to change.
Whereabouts Unknown and Muldoon's The Annals of Chile (1994) are extended eulogies diffracted through a world of things, piling up a wealth of details against time.
To alleviate the limitation of the specimen observed, a topography using scattered x-rays diffracted ones, had been proposed (refs.
If we could find a method that allows separate pairs of tokens arriving at a balancer to "collide" and coordinate among themselves which is diffracted "right" and which diffracted "left," both could leave the balancer without either having to touch the toggle bit.
The diffracted ray paths involve transmission outside the building through windows, and diffraction into paths that run alongside the face of the building, propagating until they reach another window, at which point the ray re-enters the building at a different floor.
Once that was done, he found that an electron beam was not only refracted, but also diffracted just as a beam of X rays would be.

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