Eli5: so, whatever makes up light( photons or so) never fades…?

Question

I am watching these images from James Webb telescope, and it talks about light that travelled 13 billion years!! And I am wondering then, what in this light is never disintegrating as most thing with time…?

In: 6

Answer 1

This has more to do with the fact that space is almost entirely empty. Like…so freakin empty.

So just about *anything* traveling throughout space will basically last forever unless it hits something, which is astronomically unlikely.