EM Lagrange Density

Where all EM energy is in a volume, no gravity.

Energy density of mass in motion.
Energy density of electric charge in motion.
[Notation note:The electric current density is usually written as J instead of its parts: charge * relativistic speed /volume. This was done only because the charge q will be changed soon.]
Energy density of antisymmetric change in the potential.

The pattern: rank-0, rank-1 contraction, and rank-2 contraction.

Slide 12 was not at the crime scene.

sweetser@alum.mit.edu