Question

what are point source of light

Answer 1

 Point sources of light are those whose dimensions are considered negligible due to the large distance of separation from the observer. In other words, a source of light can be considered a point source if the resolution of the imaging instrument is too low to resolve its size, or if the object is at a very great distance.

Answer 2

Defination of point source.1:a source of radiation that is concentrate at a point and considered as having no spatial extantion.2:an identifiable confined source from which a pollutant is discharged or emitted