home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!dtix!darwin.sura.net!jvnc.net!nuscc!matmcinn
- From: matmcinn@nuscc.nus.sg (Mcinnes B T (Dr))
- Newsgroups: sci.physics
- Subject: Re: Aristotle and the Modern Physicist
- Message-ID: <1992Jul27.050237.12967@nuscc.nus.sg>
- Date: 27 Jul 92 05:02:37 GMT
- References: <24JUL199220140602@zeus.tamu.edu>
- Organization: National University of Singapore
- Lines: 20
-
- Dave Ring: The gravitational constant measures the correlation between
- the Einstein tensor and the presence of matter. It is not a coupling
- constant. In this connection: the Einstein equation is in no way
- comparable to, say, Maxwell's equation. There can be no question of
- prescribing the sources and then solving for the field.
- Feynman was fond of saying many things. Many are best forgotten. If you
- had asked Newton why free particles move along straight lines at
- constant speed, he would probably have asked you what else they should
- do. It is deviation from such motion that requires explanation. This is
- also the point of view of MTW. Or at least of MT.
- Schrodinger's Massive Cat. Yes, this is a real problem, and I would like
- to see much more thought expended on it. No, I don't want to equate the
- Einstein tensor to the expectation value of T. That would be pathetic,
- and there are known problems. Still more pathetic would be to turn the
- metric tensor into some kind of operator: that would be a wretched fate
- for GR, a worthless formal game far more stupid than the much maligned
- work of Einstein's later years. No, this is a hard problem. Let us begin
- with something a little easier. If the idea of "quantizing spacetime"
- makes any sense, then it must make sense for all spacetimes. Among these
- is Minkowski space. What would "quantized Minkowski space" be like?
-