We now return to the laws of electromagnetism which we completed with the addition of Faraday's induced electric field in Chapter 31. These justly famous equations are called Maxwell's equations:
These equations have been tested for well over a century now, and as far as we know,
they are correct and complete.
Their most spectacular prediction is that changing electric and magnetic fields can
make each other by propagating as waves through space.
Maxwell's equations predict that these waves should travel at the speed
which just happens to be the speed of light. Light, in Maxwell's theory, is an electromagnetic oscillation, as are radio waves, microwaves, infrared waves, X-rays, and gamma rays.