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Probably stupid question, but do we have solid evidence that the laws of physics/constants were the same/behaved the same back then? I know that to be true for
by venomsnake 12y ago
Probably stupid question, but do we have solid evidence that the laws of physics/constants were the same/behaved the same back then? I know that to be true for the last couple of billion years. But so early in the development of the universe?
- kryptiskt 12y agoYes, we have evidence going very far back, for example, the abundances of light elements were set in the first minutes of the big bang, and they have been successfully interpreted with nuclear physics as we know it.
- timClicks 12y agoIIRC the laws of nature for this universe were set a few nanoseconds after the big bang. Around the time of inflation.
- tim333 12y agoYou can get evidence by observing the early universe with telescopes and the like. I don't think anyone has observed the laws/constants being noticeably different although you can't really prove a negative.
- privong 12y agoYou can put limits on how much they could have changed, though. And people do this, e.g., [0], which found the proton-to-electron mass ratio has not varied by more than a relative factor of 4e-7, over the past 7.5 billion years. [0] http://arxiv.org/abs/1412.7757 http://arxiv.org/abs/1412.7757