I can’t wrap my head around this. The light poles are still emiting light individually, so how do they get merged into one single source of light when viewed from space and become visible? It feels logical to me that one light pole should look the same as a hundred thousand since they’re just a repetition of one light pole with each one acting separately.
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The light spreads out as it travels through the air. Tiny bits of the light get scattered around when they’re going through the air and they bump into a piece of dust or a water droplet. If you’re looking at a light source from far away almost all of the light is getting scattered away and not making it all the way to your eye. When a bunch of light sources are close together, like in a city, all that scattered light adds up to a general glow. That’s what light pollution is, the scattered light lights up the whole area.
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