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Introduction to the Physics of Waves by Tim Freegarde

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19

Radiation from moving charges

Electromagnetic waves have, as light and radio waves, been recurring examples for many of the phenomena that we have met throughout this book, from reflection and refraction to diffraction and interference, and for many of the technological applications, from antireflection coatings to Doppler radar. Using Maxwell’s equations of electromagnetism, we can describe in exquisite detail how each of these processes occurs; and, since in characterizing the wave by the electric field strength E we refer directly to the force that the wave will exert on a static point-like test charge, we can see quite directly the processes by which electromagnetic waves are detected. The accompanying magnetic field, and its effects ...

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