%0 Journal Article %T The Cosmic Microwave Background %A Arthur Kosowsky %J Physics %D 2001 %I arXiv %X This set of lectures provides an overview of the basic theory and phenomenology of the cosmic microwave background. Topics include a brief historical review; the physics of temperature and polarization fluctuations; acoustic oscillations of the primordial plasma; the space of inflationary cosmological models; current and potential constraints on these models from the microwave background; and constraints on inflation. %U http://arxiv.org/abs/astro-ph/0102402v1