Electromagnetics: Propagation
Published:
Having established in Chapter 1 that sources ($\rho, \mathbf{J}$) give rise to electromagnetic fields, we now turn to the second link in the causal chain: Propagation.
Blog posts
2026
Electromagnetics: Sources
Published:
The causal chain of source $\longrightarrow$ field $\longrightarrow$ observable reflects the factorization of physics into three components: excitations (sources), propagation through a medium (determined by materials and boundary conditions), and measuring quantities (observations). The notes within my classical electromagnetism section will follow this structure with the first section modeling sources.
2025
Thermodynamics: Understanding Entropy
Published:
“Beauty, like order, occurs in many places in this world, but only as a local and temporary fight against the Niagara of increasing entropy.”
— Robert Wiener, The Human Use of Human Beings