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Re: B versus H



I seem to remember from my days in E & M class that the relationship
between B and H can be fairly subtile. In particular, B has the
relation between its curl and its sources ( the currents) and the fact
that the divergence is zero. H also has a reation to the sources, but
does not have the requirement the its deivergence is zero. The
properties of B and H can therefore be very different.
W. B. Newbolt

jlu@HEP.ANL.GOV 07/28/00 09:48 AM >>>
Hi all-


On Fri, 28 Jul 2000, Ludwik Kowalski wrote:

Away from home I can not check things in textbooks.
But in my mind the concept of "magnetic field" is
linked with "magnetic charges". They were first used
(by Gauss ?) to describe magnetic forces between bar
magnets, etc.

Magnetism due to electricity needed a separate symbol.
Later the simple model based on "poles" (= magnetic
charges of opposite signs) was eliminated...
______________________________snip_____________________
Not true. See Jackson (1975), p.252 (explaining Dirac).
Regards,
Jack