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

Word History and Origins

Origin of point source¹

First recorded in 1900–05

Example Sentences

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

From Project Gutenberg

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

From Project Gutenberg