With regard to labeling and the correct use of consistent terms...Dan
Davidson and I have been 'discussing' my use of the term 'diamagnetism'
instead of repulsion of poles.
Dia means opposed to....Para means attracted to.
Bismuth, copper and other materials are considered DIAmagnetic because
they are mildly repelled in the presence of a magnetic field. Polarity
doesn't matter.
Now with a magnet, its only LIKE poles that repel.
Dan thinks my term is not the one to use for magnetic repulsion (as with
like poles) yet my argument is that by the actual definition of the word
I think it is....though I will concede that diamagnetic means repellent
to ANY magnetic field regardless of polarity.
On consideration, I think for precision that Dan is correct, since
diamagnetic means repelling to ANY magnetic pole is akin to and AC
effect as opposed to REPULSION of LIKE poles which is akin to DC
effects.
Bearing that in mind I will henceforth, NOT use diamagnetic unless it
applies to repulsion by the material from ANY POLE.
Now doesn't that evoke an interesting question? Aluminum will repel
from a high density magnetic discharge REGARDLESS OF POLARITY, but ONLY
ONE POLE AT A TIME...either North or South.
....from http://www.dictionary.com/
hysteresis \Hys`te*re"sis\, n. [NL., fr. Gr. ? to be behind, to lag.]
(Physics) A lagging or retardation of the effect, when the forces
acting upon a body are changed, as if from velocity or
internal friction; a temporary resistance to change from a
condition previously induced, observed in magnetism,
thermoelectricity, etc., on reversal of polarity.
So the various diamagnetic elements have a CONTINUING repulsion from a
static magnetic field of one polarity?
And that is why terms are very important.
-- Jerry Wayne Decker / jdecker@keelynet.com http://keelynet.com / "From an Art to a Science" Voice : (214) 324-8741 / FAX : (214) 324-3501 KeelyNet - PO BOX 870716 - Mesquite - Republic of Texas - 75187