1.  Primer on some basic ideas on what the Lagrangian density is and how you use it to derive equations of motion for the fields.
  2. Leonard Susskind lecture on the Lagrangian density for the electromagnetic field.
  3. Arguing how Lagrangian density follows from the Maxwell's equations. Brute force and trial and error edition :-)
Last modified: Friday, 18 February 2022, 2:26 PM