Lagrangian density of a free electromagnetic field
10785
Form of the Classical EM Lagrangian
155043
Substitution $\partial_\mu \to D_\mu \equiv \partial_\mu + ieA_\mu$ allows the introduction of electromagnetic interactions
129567
Tangential component of Electric field
112187
Is there a way to see that $ \nabla_\mu g_{\nu \rho} = 0 $ without explicit computation, where $\nabla_\mu$ refers to the covariant derivative?
119258
Electromagnetic field and continuous and differentiable vector fields
51122
Lagrangian of Schrodinger field
130366
Self-energy of a uniformly charged, non-conducting sphere, using energy density formula
30992
How do you determine the Lagrangian?
7555
Why do we consider Lagrangian densities in field theory (as opposed to Lagrangians as in point mechanics)?
64935
Using photons to explain electrostatic force
13758
Physical meaning of Maxwell's equations and origin of EM waves
55992
Why is dipole the simplest source in electrodynamics?
115275
Vector field of charges
66395
What is permittivity in free space?
101944
Fundamental invariants of the electromagnetic field
27866
Does existence of magnetic monopole break covariant form of Maxwell’s equations for potentials?
15275
How do you go from quantum electrodynamics to Maxwell's equations?