Question

the magnitude of the constant speed of electromagnetic waves is a remarkable consequence of what central principle/law of physics?
○ law of conservation of energy
○ law of thermodynamics
○ faradays law
○ coulombs law
○ law of inertia
○ law of conservation of mass
○ law of conservation of momentum
○ principle of equivalence
○ law of universal gravitation

Explanation:

Faraday's Law is related to electromagnetic induction. The speed of electromagnetic waves is derived from Maxwell's equations which are based on Faraday's Law (among other laws like Ampere - Maxwell law etc.). The Law of Conservation of Energy is about energy forms conversion, Law of Thermodynamics is about heat and work, Coulomb's Law is about electrostatic force, Law of Inertia (Newton's first law) is about motion of objects, Law of Conservation of Mass is about mass in a system, Law of Conservation of Momentum is about momentum in a system, Principle of Equivalence is in the context of general relativity (relating gravity and acceleration), Law of Universal Gravitation is about gravitational force.

Answer:

Faraday's Law