It can't just be perception though as the result would be the same if I set up a camera at these same points.It doesn't stop.
If the energy that created it is there then so will the light.
It only stops to your perception because your vision does not see it over distance.
Cameras don't have perception they just absorb what light reaches the lens.
Or is this another word that you don't understand? Note that it says senses not sensors below.
perception
/pəˈsɛpʃ(ə)n/
See definitions in:
Psychology
Zoology
noun
1.
the ability to see, hear, or become aware of something through the senses.
"the normal limits to human perception"
2.
the way in which something is regarded, understood, or interpreted.
"Hollywood's perception of the tastes of the American public"