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point source
noun
- a source of radiation sufficiently distant compared to its length and width that it can be considered as a point.
point source
noun
- optics a source of light or other radiation that can be considered to have negligible dimensions
Word History and Origins
Origin of point source1
Example Sentences
One PSF basically describes how an infinitely small point source of light originating in the sample is widened and spread into a three-dimensional diffraction pattern by the optical system.
"But declining levels of phosphorus, particularly in rivers flowing through urban areas, suggests that efforts to control phosphorus pollution from point sources such as wastewater treatment plants are working."
Researchers developed a method to automatically detect methane emissions at a global scale, potentially providing methane detection at high frequency and high resolution from point sources.
They assumed then that the quasar's light stemmed from a single, star-like "point source."
They discovered that diesel-powered vehicles emitted about half of the nitrogen oxides from road vehicles, while additional pollutants such as benzene were emitted from other point sources, including nearby petrochemical refineries.
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