What: "Minkowski's wrench is referring to a screw mechanism. It goes back to Maxwell's On Physical Lines of Force see page 53. In essence the electric field is like the twist in the screw, and the magnetic field is like the rotation that comes with it. So permittivity is telling you the "twistability" of space, and permeability is telling you how good it is at making things turn."

Writer: Farsight

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Date: Aug 1 2013 3:29 PM