This book brings together and couples results from electromagnetic, mechanics, thermodynamics, solid state physics, chemistry, optics, and materials science to provide a coherent picture of materials science, in particular their optical properties. It discusses the underlying physical basis of the each property, including constituents, bonding, and structural order. The book also discusses units and unit conversions, provides simple models for estimating properties or extrapolating data as well as examples of how to fit data using these models. Two chapters are completely devoted to practical problems in optical systems-- Provided by publisher.