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- Path: sparky!uunet!gatech!asuvax!chnews!sedona!bhoughto
- From: bhoughto@sedona.intel.com (Blair P. Houghton)
- Newsgroups: sci.physics
- Subject: Re: Magnetic question (again!)
- Date: 22 Dec 1992 17:52:34 GMT
- Organization: Intel Corp., Chandler, Arizona
- Lines: 19
- Message-ID: <1h7kl2INN9rh@chnews.intel.com>
- References: <1992Dec17.183821.13124@topaz.ucq.edu.au> <1992Dec19.191427.2941@gacvx2.gac.edu>
- NNTP-Posting-Host: stealth.intel.com
-
- In article <1992Dec19.191427.2941@gacvx2.gac.edu> kiran@gacvx2.gac.edu writes:
- >In article <1992Dec17.183821.13124@topaz.ucq.edu.au>, freeman_l@topaz.ucq.edu.au writes:
- >> A magnetic field can move around in space. This seems at first thought to be
- >> a pretty obvious statement, but.... WHAT is actaually moving? Has a magnetic
- >> field got some fine internal structure, like the Classical lines of Force,
- >> so that you can say: THIS bit of the magnetic field is now over HERE!
-
- A magnetic field is a vector field giving a spatio-
- temporal (and relativistic) relation for a moving charge.
- The existence of the field in the absence of other charges
- is a question akin to the sound of a tree that falls in an
- uninhabited forest.
-
- I don't think you can move "bits of the magnetic field" around
- unless you plan to curve space. You can "move" the field,
- i.e., reconfigure it, simply by moving charges.
-
- --Blair
- "I want my MTV."
-