This book describes the basic physical principles of atomic spectroscopy and the absorption and emission of radiation in astrophysical
and laboratory plasmas. It summarizes the basics of electromagnetism and thermodynamics and then describes in detail the theory
of atomic spectra for complex atoms, with emphasis on astrophysical applications. Both equilibrium and non-equilibrium phenomena
in plasmas are considered. The interaction between radiation and matter is described, together with various types of radiation
(e.g., cyclotron, synchrotron, bremsstrahlung, Compton). The basic theory of polarization is explained, as is the theory of
radiative transfer for astrophysical applications. Atomic Spectroscopy and Radiative Processes bridges the gap between basic
books on atomic spectroscopy and the very specialized publications for the advanced researcher: it will provide under- and
postgraduates with a clear in-depth description of theoretical aspects, supported by practical examples of applications.