Lorentz and Unification of Forces

Coulomb's law is not Lorentz-covariant, nor is the law governing the force on a moving charge in magnetic field. Lorentz combined these two forces and observed that the combined force becomes covariant in the Lorentzian world. Lorentz in this way unified electric and magnetic interactions.

Another Gift from Hendrik Lorentz

Y. S. Kim (2006.9.5)