If we know how old the universe is based on the fact that objects furthest away from us we can see are ~14 billion light years away, how do we know that there was light right from the beginning of the Big Bang? Couldn’t there, in theory, have been darkness for X billions of years before light?

Question

If we know how old the universe is based on the fact that objects furthest away from us we can see are ~14 billion light years away, how do we know that there was light right from the beginning of the Big Bang? Couldn’t there, in theory, have been darkness for X billions of years before light?

In: Physics

Answer 1

> Couldn’t there, in theory, have been darkness for X billions of years before light?

Yes, it could. The 14 billions years thing is for the visible universe. If there was something before or beyond the visible universe we dont know, we cant see or measure it.