They are called the inhomogeneous Maxwell's equations because they are sourced by the charge and current densities embedded in the four-vector $K^\nu$.

Why are Gauss's Law and the Ampère-Maxwell Law collectively called the inhomogeneous Maxwell's equations-L.mp4

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1. What are the sources for the inhomogeneous Maxwell's equations?
2. Why are Gauss's Law and the Ampère-Maxwell Law collectively called the inhomogeneous Maxwell's equations? </aside>