Final answer:
Faraday's law of induction and Ampère's law with Maxwell's addition are the two equations from Maxwell's formulations that specifically underpin the concept of electromagnetic wave propagation.
Step-by-step explanation:
The equations that form the basis for our understanding of electromagnetic waves are derived from Faraday's law of induction and Ampère's law with Maxwell's addition. Faraday's law explains how a changing magnetic field induces an electromagnetic force and, consequently, an electric field. Ampère's law, with Maxwell's addition, describes how a changing electric field generates a magnetic field. These interactions detail the mechanism by which electromagnetic waves are propagated, as changing electric fields and magnetic fields generate each other.