Blackbody Radiation: Emissive Power Spectrum

This lecture covers the fundamental concepts of blackbody radiation, focusing on the emissive power spectrum and Planck's law. It explains the spectral hemispherical emissive power of a blackbody, Wien's displacement law, and the different approximations used to describe blackbody radiation. The instructor discusses the relationship between emissivity, absorptivity, and reflectivity, as well as the predictions derived from electromagnetic wave theory, such as Fresnel's equations and Snell's law. The lecture also explores the surface radiative properties, including emissivity, absorptivity, and reflectivity, and their spectral and directional variations.