I was thinking of how light actually gets into my eyes, and thought about my light bulb shining rays to every part of my bedroom wall, and reflecting them towards me. but then i realized, i could be at many different locations and still see all that light, so it must either be bouncing off in all directions, or the light that shined elsewhere has bounced around the room to end up reflecting off the wall in all other directions.
so i can view the entire wall from bazillions of atom offsets of spaces in my room. but lets just concentrate on two atom positions directly on my index fingers. the entire wall is shining directly into those two atoms. so light is passing through other light that is heading towards another direction.
just with this simple scenario of the wall shining towards two positions, in my imagination, two pyramids of light colliding with each other, which is hard to imagine how that works, let alone the bazillions more intersecting, constant flowing of light that reveals the slightest of dust in the air on sunny days, from all places in your room, and how it can travel out into space, like the stars do towards earth from light years away, just concentrating into smaller and smaller amounts of atoms space. it really breaks my mind at how light even works.
so i guess my question is, pretty much, how does light travel?