Maxwell’s Equations and Light Speed

Electromagnetic waves follow Ampere’s law when there is no conduction current. A plane wavefront moves in the positive x-direction. To analyze it, a rectangle is placed in the xz-plane with its area vector pointing in the positive y-direction.

The line integral around the rectangle is taken count...

Electromagnetic waves are consistent with Ampere's law.

Consider a plane wavefront traveling in the +x-direction. Over it, consider a rectangle in the xz-plane, with an area vector in the +y-direction.

The integration is performed counterclockwise around the rectangle.

The magnetic field is either ...