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History: -Ray
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Source of version: 2
(current)
{INCLUDE(page="ogrelex ext tpl")/} --- In optics, a __ray__ is an idealized narrow beam of light. Rays are used to model the propagation of light through an optical system, by dividing the real light field up into discrete rays that can be computationally propagated through the system by the techniques of ray tracing. !!See also * http://en.wikipedia.org/wiki/Ray_(optics)
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