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Re: From the PhyShare list



IMHO We are dealing with a physical reality, not mathematics. A small "r"
is vastly a different case from a zero "r" !! The mathematical singularity
will not exist in the real world.

Oren Quist, SDSU

-----Original Message-----
From: RAUBER, JOEL
Sent: Wednesday, May 23, 2001 8:56 AM
To: PHYS-L@lists.nau.edu
Subject: Re: From the PhyShare list


I'll venture forth a first response to the questions, others I'm sure will
expand on my thoughts and do a better job.

My first thought is simply that nobody knows the answer to the question! It
is a deep question that has been puzzling the minds of theoretical
physicists for decades.

The question delves into what happens to GR when the time and length scales
become small einough that one expects quantum mechanics to play an important
role in the physics. AFIK there has not been a completely self-consistant
QFT (Quantum Field Theory) for gravity posited to date. Various string
theories offer tantalizing possibilities that some buy into as being a
partial answer to the question and others being less sure.

John Denker or David Bowman or others, do you care to expand on this?

Joel rauber
-----Original Message-----
From: Chuck Britton [mailto:britton@NCSSM.EDU]
Sent: Wednesday, May 23, 2001 7:17 AM
To: PHYS-L@lists.nau.edu
Subject: From the PhyShare list


If someone would like to shed some light on this to the PhyShare
list, I'm sure that they would appreciate it.




Date: Wed, 23 May 2001 02:17:20 -0400
Reply-To: Sharing resources for high school physics
<PHYSHARE@lists.psu.edu>
Sender: Sharing resources for high school physics
<PHYSHARE@lists.psu.edu>
From: Hans Van Dyke <Mudd@PLANETHALFLIFE.COM>
Subject: Black Holes and Heissenberg
To: PHYSHARE@LISTS.PSU.EDU

I'm a little on the tame side when it comes to concrete
knowledge about
physics, but after doing some classes dealing mostly in
theory, and getting
the better portion through A Brief History of Time, an issue
started to
trouble me. I went to my Physics teacher to solve this
question, like oh-so-
many others, but he was also baffled. He suggested this thing.

The question is this: If a Black Hole reaches a point of
singularity, and
at that very point there would be mass, would that not lend itself to
suggest that a point of singularity (having absolutely no
volume) would
completely break the Heissenburg Uncertanty Principle? If I'm
seeing things
correctly, something is wrong, Heissenburg, or the current
model for the
Black Hole.

Please help set me right here, I've been pondering over this
one for almost
a month now.

-Hans Van Dyke
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Chuck Britton Education is
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