An Intuitive Guide to Maxwell’s Equations

Within a few years, James Clerk Maxwell transforms Faraday’s visionary insight into a system of equations describing the fields. He grasps that light is nothing but a swift ripple upon these webs, and that these ripples, at greater wavelengths, can bear signals. Hertz reproduces them in the laboratory,

Unlike the field around the magnet, however, the electromagnetic field around the photon is not constant in strength. Instead, it fluctuates as the photon travels. If we could see this change in the strength of the field it would look something like Figure 2.1.