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point source

noun

, Physics, Optics.
  1. a source of radiation sufficiently distant compared to its length and width that it can be considered as a point.


point source

noun

  1. optics a source of light or other radiation that can be considered to have negligible dimensions
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of point source1

First recorded in 1900–05
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Example Sentences

You simply imagine that there is a point source of light at your point of projection: it isn't really there.

The light used must come from a point source, the smaller and the more intense it is the better.

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pointsmanpoint spread