Radiative Heat Transfer: Surface Properties

This lecture covers the fundamental concepts of radiative heat transfer, focusing on surface properties such as emissivity, absorptivity, reflectivity, and transmissivity. It explains the ratios of emitted, absorbed, reflected, and transmitted fluxes, and their relationships with blackbody radiation. The lecture delves into the spectral and total radiative properties of surfaces, including directional and hemispherical aspects. It also discusses Kirchhoff's law, Kirchhoff's law of thermal radiation, and the relationships between different radiative properties. The lecture concludes with examples and predictions from electromagnetic wave theory, emphasizing the importance of understanding surface radiative properties for heat transfer applications.