  The Lorentz force law of classical electrodynamics requires the introduction
of hidden energy and hidden momentum in situations where an electric field acts
on a magnetic material. In contrast, the Einstein-Laub formulation does not
invoke hidden entities. The total force and torque exerted by electromagnetic
fields on a given object are independent of whether the force and torque
densities are evaluated using the law of Lorentz or that of Einstein and Laub.
Hidden entities aside, the two formulations differ only in their predicted
force and torque distributions throughout material media.
