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Re: [Phys-l] Teaching Special Relativity

On Jul 6, 2009, at Jul 6(Mon) 1:43 , Jack Uretsky wrote:

Strictly speaking, there is no magnetic-electric equivalence. A field that is purely magnetic in some reference frame can never be transforme ( by a L-transformation into one that is purely electric, and vice-versa.
Regards,
Jack

Feynmann certainly leaves the impression that one can.

But I'll be the first to admit (proclaim) that EVERYTHING that Feynmann writes is perfectly clear on first reading
but much less so upon further contemplation!!