Physics, Electrodynamics, Electromagnetic Waves, Science, Maxwells Equations.
de-coupling these equations, which is a trivial process if you take the curl of the equations on the right, something that mathematicians refer to as the vector triple product. The identity for this expression states that ∇ × (∇ × A) = ∇ (∇.A) — ∇²A. The divergence of E and B will vanish in this