[EMAIL PROTECTED] wrote: > > > -----Original Message----- > From: Stephen A. Lawrence > > The predicted magnetic field of a current can be obtained simply by > Lorentz transforming the electric field from the rest frame of the > charges making up the current to the frame of the observer moving > relative to them. Remarkably, the result is a first-order effect -- > first order in the relative velocities -- unlike just about everything > else predicted by relativity. > > <><><><><> > > There are no charges (q) involved in permanent magnets. I hereby > extract myself from this discussion. >
Charges may be involved. However, the _reality_ of a permanent magnetic body is not recognised by a relativistic charged based model of magnetism. The relativistic model implies that the permanence of a permanent magnetic body is a matter of opinion since one could execute some motion relative to the body and decide it is non-magnetic. Harry
