On Apr 17, 9:33 pm, "weatherwax" <weather...@worldnet.att.net> wrote:
pba...@worldonline.nl> wrote
"weatherwax" <weather...@worldnet.att.net> wrote:
"BRAINIAC" <nour...@hotmail.co.uk> wrote
And may I remind you once again, your opinion that I have closed
my eyes and ears to Roger Penrose's work and comments is
completely unfounded. And in the light of the fact that I informed
you that I am reading Roger Penrose's book completely false.
Brainiac,
One good thing about this discussion is that it has gotten me back to
reading "The Road to Reality" again. I had given up about half way
through because the math was beyond anything I had. However,
the second half of the book is more theoretical and has less math.
I read "The Emperor's New Mind" several years ago and wish I
knew where my copy was.
You mentioned that you are reading Penrose's book "The Emperor's
New Mind". May I call your attention to the sections on Weyl and
Ricci tensors?
Penrose points out that at the Big Bang Ricci curvature predominates,
but in a black hole (or the Big Crunch) Weyl curvature predominates.
The result: The Big Bang is hot and low entropy while black holes
are cold and high entropy. In other words, gravity is not time
symmetric.
Quantum forces on the other hand are time symmetric. Penrose
believes we have to unite quantum mechanics with General
Relativity before we can come up with the solution to the fine tuning
of the universe problem. Penrose also says we are nowhere near
doing that.
--Wax
The difference between a black hole and the big bang is illusionary.
The black hole is not low entropy, and it is not cold. All matter inside
the black hole has accelerated towards light speed. That means that it
has maximum temperature. (temperature being the average velocity
regardless of direction) also the matter inside a black hole all has the
same direction (inside) that means it has minimum entropy.
A falling body loses energy. For example: If an object is sitting on a
table, it has a fixed potential energy in relation to the floor. If the
object falls off the table onto the floor, that energy is lost. It will
take and equal amount of energy to replace the object back on the table.
The following is a quote from page 706 of "The Road To Reality".
Gravitation is somewhat confusing, in relation to entropy,
because of its universally attractive nature. We are used to
thinking about entropy in terms of an ordinary gas, where
having the gas concentrated in small regions represents low
entropy . . . and where in the high-entropy state of thermal
equilibrium, the gas isspread uniformly. But with gravity, thing
tend to be the other way about. A uniformly spread system of
gravitating bodies would represent relatively low entropy . . .
whereas high entropy is achieved when the gravitating bodies
chump together.
Roger
Penrose
Temperature is measured by the amount of heat or energy being given off by a
body. With the exception of Hawking's radiation, nothing can excape from a
black hole, and Hawking radiation is quite small, therefore the black hole
itself is cold.
Moreover one can easily calculate that when the universe was only
500.000 years old, the matter that we can - theoretically - see today
was comprised in a space with a radius smaller than it's schwarzschild
radius. Thus the universe was a black hole by definition. (matter
comprised into a space inside it's own schwarzschild radius)
Wow you guys are close.Actually according to this alternate theory you
cant have singularities because every time you try you end up with a
black hole and if you remember the theory it predicts that the time
dilating effects expand space.
Every time you create a black hole you expand space so I suppose you
could say that all of that newly created space gets in the way of
forming that hypothetical singularity.You cant have singularities
without the gravity and you cant have gravity without its time slowing
effects and you cant have those time slowing effects without
contracting matter and expanding the space.
Probably worth noting how this expanding space effect may give the
same predictions as those now credited for how gravitational binding
energy works to conserve the total original amount of gravity.
What you are describing is a white hole, because energy is coming out of it,
rather than falling in.
An event horizon seen from the inside of a black hole ends up being a
white hole.Remember that expanded space can very easily end you up
with more space than the original event horizon could originally
contain.This alternate theory gets to predict some rather odd things
about how our white hole or rather now as white holes as they would
appear as broken up into different locations would appear and
behave.Easy to understand how their repulsive gravity's would be a bit
like throwing objects at the sky and then claiming the sky has
antigravity properties but the stuff about how they should behave in
some ways like wormholes would be more surprising.
They will need to be observable in our universe for this theory to be
valid but keep in mind that even white holes can appear dark if
nothing falls into them from the previous universe.But if lots do fall
into them and randomly then they could easily appear like quasars.I
should post asking about the idea that quasars could be these types of
white holes and its easy to disprove if any object has ever been seen
accelerating towards one.
alttheories.com
Dale