Quote:
Originally Posted by cahullian
I don't think light runs out , I think it gets absorbed. If you are in a room with no windows or doors the light inside the room won't be seen from the outside as the walls absorb said light.
Just my layman term for something I have no understanding of.
Gazz
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I'm with Gazz, also as a layman. If photons travel at the speed of light, doesn't that mean that they must have zero mass? And if so, doesn't that mean that they can travel without losing energy unless they are absorbed by something that they encounter on the way? And here I may really reveal my astronomical ignorance - don't even massive objects like planets continue through space without losing momentum unless they encounter another object? If all these are true, light would not run out unless it is caught out. I think. Grateful for education from the more knowledgeable
Patrick