parallel rays


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parallel rays

[¦par·ə‚lel ′rāz]
(mathematics)
Two rays lying on the same line or on parallel lines.
Two rays that lie on the same line or on parallel lines, and point in the same direction.
References in periodicals archive ?
Two parallel rays from the top and bottom of the object are refracted at the front surface of the eye, cross a short distance behind its geometrical centre, at a point referred to by Gaukroger as the focus, and then diverge again to produce an inverted image on the retina.
Previous analyzers could resolve only a very intense X-ray beam, a beam of a single wavelength, or a beam of highly parallel rays.
In a flat universe, parallel rays stay parallel forever on the largest scales.

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