Cosmological redshift: how much energy has gone missing?

[marcus]

Originally posted by schwarzchildradius
as long as you have no problems with infinite energy existing in an infinitely small volume, then physics has no problem describing the conditions of t=0.

Are you still discussing John Baez's essay
"the Meaning of Einstein's Equation"?

http://math.ucr.edu/home/baez/einstein/einstein.html

It has 9 pages linked together and he calls it "a brief introduction to General Relativity." I still go back over certain pages from time to time because it is a masterful job of making an honest presentation of the mathematics short and understandable.

I suggested you look at page 2 , "Preliminaries".

I can't tell what you are discussing. It does not seem to be page 2.

On many of the pages (not page 2 but others) he uses "t=0"
to stand for some normal reference time, like the present, after the universe is well on its way and evolving normally. Think of it as noon GMT on March 1----some arbitrary time zero. In no case does he use "t=0" to refer to a singularity. Nothing in the essay concern infinite densities. So it has been four days now since I suggested the essay to you and it clearly has not helped you.
I'm not clear about why. But probably means I shouldn't recommend online physics links to you.

 

[schwarzchildradius]

You've got a weird attitude. That particular link has been discussed on PF last year. In any case, t=0 refers to the singularity at the beginning of time. If you have a solution/explanation for this, we would all love to hear of it!

 

[marcus]

Originally posted by schwarzchildradius
You've got a weird attitude. That particular link has been discussed on PF last year. In any case, t=0 refers to the singularity at the beginning of time. If you have a solution/explanation for this, we would all love to hear of it!

The explanation is simple, in Baez essay t=0 nowhere refers to the beginning of time. You totally failed to come to grips with the meaning of his essay, if you think that.
His essay is called "The Meaning of Einstein's Equation"
If there is anyone still at the board who took part in
a discussion "on PF last year" of that online essay, I invite
you to ask them if t=0 means the beginning of time
in that essay. If anyone thinks that, they totally failed to
grasp the equations and should go see a mentor like Tom
or damgo.

I am sorry but I don't feel I should spend any more time on this.
I am not sure I am getting a straight story from you, what with the "physics breaks down" business which was not in Baez essay and our failure to connect about the meaning of basics like the timescale. Adios. Bye.