4
votes
Does the inverse square law apply to all lights, including light within a lens?
Light from a normal point source travels omnidirectionally, so a given number of photons(1) traveling outward from a light source must illuminate a larger sphere the further you get from the source.
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3
votes
Does the inverse square law apply to all lights, including light within a lens?
The law of the inverse square tells us that light intensity falls off 4x with each doubling of distance. In other words, if you are reading a book by the light of a single lightbulb 1 foot away from ...
- 38.5k
2
votes
Does the inverse square law apply to all lights, including light within a lens?
This answer is empirical. I will not try to make a mathematical one. This is only a series of statements.
In general, the inverse square law applies to a point light.
Every big diffusive light at ...
- 23.1k
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