The course can be summed up in two words, propagation and interaction. Imagine any remote sensing situation involving electromagnetic radiation: a radar system is an obvious example with extensive civilian and military applications. The important processes are the propagation of the radiation to and from the object being sensed, the interaction of this radiation with the medium it is propagating through and its interaction with the material the object is made of. This need not to be confined to propagation between an antenna and a target. Before it reaches the antenna the radiation must pass through cables and waveguides which again involve propagation and interaction. Fundamental to all this are Maxwell's equations, and it is important to reach an understanding of what they can tell us about the propagation and interaction of electromagnetic radiation.