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
No, there’s not enough in the way to stop it from keeping going.
Light is a combination of a changing electric field and a changing magnetic field moving together, keeping each other going. The physics works out that when left on its own, those fields don’t get any weaker as they move. And since space doesn’t have much in it, there’s a lot of “them being left on their own”.
You could ask the same sort of thing about Voyager 1, the space probe that’s currently roaming the stars. “Won’t it eventually stop?” And the answer would be the same. “No, there’s not enough in the way to stop it.”
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