  This lecture gives an introduction to the basic physics of the electrical
conductivity of metals, its temperature dependence and its limiting factors. We
will then introduce the concept of surface resistance, of high relevance in
accelerators for its link with beam impedance and for RF applications,
including notions related to the anomalous skin effect. The surface resistance
will help establishing a link to heat exchanges between bodies by radiation,
and to the concept of emissivity. Thermal conductivity will then be introduced,
discussing both its electron and phonon exchange components, and the relevant
limiting factors.
