Question

Prove that the electromagnetic field vectors in a travelling electromagnetic wave are normal to each other and also perpendicular to the direction of propagation.​

Answer 1

Answer:

Mechanical waves travel through a medium such as a string, water, or air. Perhaps the most significant prediction of Maxwell’s equations is the existence of combined electric and magnetic (or electromagnetic) fields that propagate through space as electromagnetic waves. Because Maxwell’s equations hold in free space, the predicted electromagnetic waves, unlike mechanical waves, do not require a medium for their propagation.