3 ms·
Right. It's not possible to prove Maxwell's equations from first principles, we only "know" they are true from experience. In particular, there's no logical rea
by gweinberg 11y ago
Right. It's not possible to prove Maxwell's equations from first principles, we only "know" they are true from experience. In particular, there's no logical reason divergence of B has to be zero; logically there could be magnetic monopoles, but experience seems to indicate there are not.