Difference between revisions of "Luminous beam"
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Revision as of 10:00, 25 February 2009
2-1-085
(Luminous) Beam
Alternative term: (Light) Beam
A group of rays emanating from a light source, and in general from an optical device.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)