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The Big Retro/Modern Picture


Retro Problems:
  1. Maxwell Equations (and only EM) in the Lorenz gauge (1870?):
  2. Gravity is an inverse square law, so the potential must be 1/distance (~1800).
  3. Toss out average derivatives, add in the gauge (1950):

Modern solutions:
  1. 4D Wave equation requires a 4D wave, 2 for EM, 2 for gravity (2000).
  2. Gravity is weak, so perturbation theory is required: (2002).
  3. A complete picture requires noting is tossed or added (2002):




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