Quote:
Originally Posted by ballaratdragons
Thank you for all your many and varied (and off topic) replies.
Many of you say that light never wears out. Yet, light is always being made.
Does that mean 'Space' is getting lighter (brighter)?
If, as some of you believe, the Universe if finite, that means we will eventually be flooded by light.
Sorry, I can't go with all that.
If light was to last forever, it would have to travel on forever to 'not' brighten space. Hence an Infinite Universe, but that is another topic.
Even still, somewhere in the back of my mind is the nagging belief that light does eventually wear out (or redshift) (or alter in the radiowave spectrum).
'Dark' runs out when 'light' enters it, can 'light' run out when 'Dark' enters it?  |
Hi Ken,
This might be a simple-minded response to be superseded by one from a more knowledgeable contributor, but "wearing out" is not the only option for light to cease being visible light. There is red shifting as has already been pointed out, but also absorption. Photons will run into things and be absorbed. So light not wearing out or running out would not necessarily imply that the universe will continue to get brighter.