Explore the transition from classical to quantum physics through the radiation of an electron in circular motion, deriving the power radiated and its implications for particle physics and technology.

A charge moving through a magnetic field experiences a perpendicular force due to the Lorentz force.

Antenna arrays are an important class of antennas which are widely used in point to point communication systems, where a very high directive beam of radiation is needed.

One of the most widely used antennas in telecommunication is the dipole antenna. In this problem, we investigate the radiation properties of such an antenna.

In this problem we first investigate the radiation properties of a very short and thin filament of current.

The Drude model explains the electrodynamic properties of metals. The simple approach is to regard the conduction band electrons as non-interacting electron gas.

Usually, gauge transformations are used to simplify certain calculations. In this problem, we want to use them to derive charge conservation from the invariance of the action S.

Lorentz invariance is at the core of any (special) relativistic theory. Sometimes, however, we encounter expressions that seem to transform in a wrong way. This is especially true for the four-potential calculated from the retarded four-current. Find out why the four-potential is indeed Lorentz invariant!

The simplest form of an antenna array are two short dipole antennas. In this problem you will learn how a phase difference between the currents of both antennas affects their combined radiation pattern.

An alternative Lagrangian for electrodynamics is be shown to be applicable.