point source


General Science


  • A light source, the dimensions of which are insignificant at viewing distance. A fluorescent lamp is a point source at a large distance.
  • A pollution source that is discharged at an identifiable point such as a single pipe or smoke stack.


  • A source, such as that of electromagnetic radiation or sound, whose dimensions are so small in relation to the distance traveled to its detector or receiver, that it can be considered to be just a point.