prism


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prism,

in optics, a piece of translucent glass or crystal used to form a spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
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 of light separated according to colors. Its cross section is usually triangular. The light becomes separated because different wavelengths or frequencies are refracted (bent) by different amounts as they enter the prism obliquely and again as they leave it (see refractionrefraction,
in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass.
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). The shorter wavelengths, toward the blue or violet end of the spectrum, are refracted by the greatest amount; the longer wavelengths, toward the red end, are refracted the least. The Nicol prismNicol prism
, optical device invented (1828) by William Nicol of Edinburgh. It consists essentially of a crystal of calcite, or Iceland spar, that is cut at an angle into two equal pieces and joined together again with Canada balsam.
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 is a special type of prism made of calcite; it is used for polarization of lightpolarization of light,
orientation of the vibration pattern of light waves in a singular plane. Characteristics of Polarization

Polarization is a phenomenon peculiar to transverse waves, i.e.
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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

Prism

A geometric solid with regular polygons at its ends and parallelograms on its sides connecting the ends.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Prism

 

a polyhedron in which two of the faces are n-gons (the bases of the prism) and the remaining n faces (the lateral faces) are parallelograms. The bases of a prism are congruent and lie in parallel planes.

Figure 1

A prism is called a right prism if the lateral edges are perpendicular to the bases. A right prism is regular if each base is a regular polygon. Prisms can be triangular, quadrangular, and so on, depending on whether the bases are triangles, quadrilaterals, and so on. Figure 1 illustrates a hexagonal prism (the one on the left is also a right prism). The volume of a prism is equal to the product of the base and the altitude (the distance between the bases). See also.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

prism

[′priz·əm]
(crystallography)
A crystal which has three, four, six, eight, or twelve faces, with the face intersection edges parallel, and which is open only at the two ends of the axis parallel to the intersection edges.
(geology)
A long, narrow, wedge-shaped sedimentary body with a width-thickness ratio greater than 5 to 1 but less than 50 to 1.
(mathematics)
A polyhedron with two parallel, congruent faces and all other faces parallelograms.
(optics)
An optical system consisting of two or more usually plane surfaces of a transparent solid or embedded liquid at an angle with each other. Also known as optical prism.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

prism

1. a transparent polygonal solid, often having triangular ends and rectangular sides, for dispersing light into a spectrum or for reflecting and deviating light. They are used in spectroscopes, binoculars, periscopes, etc.
2. a form of crystal with faces parallel to the vertical axis
3. Maths a polyhedron having parallel, polygonal, and congruent bases and sides that are parallelograms
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

PRISM

A distributed logic language.

["PRISM: A Parallel Inference System for Problem Solving", S. Kasif et al, Proc 1983 Logic Prog Workshop, pp. 123-152].
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

PRISM

(1) (PhotoRefractive Information Storage Materials Consortium) A collaboration of IBM, Stanford University, GTE, Hughes Research Labs, Optitek, SRI International and Rockwell Science Center that is funded by the U.S. government's Advanced Research Projects Agency for the purpose of researching holographic storage.

(2) (PRogrammable Integrated Scripts for Mirror) The programming language for the Mirror communications programs.

(3) See PR/SM.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
"We're looking for the right people to join Prism and become part of a dynamic team dedicated to improving efficiencies in the construction industry.
PRISM scoring system is a physiologic stability index which is used to predict mortality through normal physiologic disturbances during the period of disease.
Blue Prism's connected-RPA puts the power of AI in the hands of business leaders in order to enable operational agility.
Plus EnerG, with its sales, design and project management expertise is uniquely situated to bring the Prism technology and other solutions to large commercial and industrial clients.
Where a fully custom prism is required, expert optical design and manufacturing engineers can help develop a solution.
The combination of Plus EnerG and Prism includes a solar solutions company, including US based panel manufacturing, solar installation design and project management.
Blue Prism's Digital Workforce augments, supports and assists humans to increase productivity, improve experience, and deliver true operational agility for business-wide RPA deployments.
The objective of present study was to determine the performance of the PRISM in our PICU to compare the predicted mortality with the observed mortality and determine the suitability of each for monitoring the quality of intensive care in our unit.
According to the four middle school teachers' knowledge, students are not aware of the unit cubes that they do not see and do not concentrate on the inside of the prism. Thus, the students think that a prism is only composed of the visible unit cubes.
Fitch believes year-end 2017 Prism Scores are unlikely to materially change for most insurers despite substantial reported catastrophe losses in the second half of the year.
Sir Isaac was able to see the rainbow colors red, orange, yellow, green, blue, indigo, and violet using a prism. If you could look at the surface of the CD through a microscope, you would see that it contains thousands of prisms.