Difference between point source of light and extended source of light
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22
Answer:
A point source is really a mathematical construct. It is a point singularity of emission on a source. Point sources emit spherical waves of radiation. The surface of constant phase of light from the point source is called a wavefront. In other words, a wavefront is a surface of constant spatial phase. Extended sources are made up of a collection of such point sources
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Point Source of Light
● It is that source of light which forms
only the umbra.
● region on the screen of the shadowed
object.
Extended Source of light
●It is that source of light that forms
umbra as well as
● the penumbra region on the screen of
the shadowed object.
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