Agobot writes:
Why do scientists try to use General Relativity at the Singularity?
It's not that they are
trying to apply it to the singularity, it's that using GR the equations
break down into a singularity.
The way i see it is this - prior to the BB there was nothing physical, just energy. After the BB there is still nothing physical, just energy and thus nothing arose of nothing and something did not arise of nothing.
And there will always be energy. However, our reality is one of a physical matter, and thus can be explained by physics.
There was just an enormously dense enegy prior to the BB that has since then spread out considerably.
That is what GR tells us about T=O, the equations breaks down into infinite density, temperature, and curvature. But, thats not the only theory. Like we were talking about on Bertot's thread, the No-Boundary proposal introduces a no-boundary unviverse that does not require a BB singularity; since the universe has no boundaries there is no starting point. It would be like trying to explain to me at what point on the Earths surface does the Earth begin.
But, there are other theories as well, Loop QM also has no singularity in it's equation nor will any unifying theory. So it's a bit premature, IMO, to say for certain what conditions were like before the BB, because for all we know there was no beginning point.
Why would we try to apply physical laws from our classical world to an energy point with no physical dimensions?
The universe works within a frame of physical laws Abogot, I think you are well aware of that. We humans have been able to understand most of it. Our reality is of a physical nature and if
we are the one's trying to explain the origin of the universe we must use a system that we can work with...like physical laws. We are just doing our best to explain. Don't get so cynical.
"All great truths begin as blasphemies"
"I smoke pot. If this bothers anyone, I suggest you look around at the world in which we live and shut your mouth."--Bill Hicks
"I never knew there was another option other than to question everything"--Noam Chomsky