The Big Retro/Modern Picture
Retro Problems:
- Maxwell Equations (and only EM) in the Lorenz gauge (1870?):
- Gravity is an inverse square law, so the potential must be 1/distance (~1800).
- Toss out average derivatives, add in the gauge (1950):
Modern solutions:
- 4D Wave equation requires a 4D wave, 2 for EM, 2 for gravity (2000).
- Gravity is weak, so perturbation theory is required:
(2002).
- A complete picture requires noting is tossed or added (2002):
Slide 63 liked it.