Radiation and Absorption: Fundamentals

This lecture covers the fundamental concepts related to radiation, including emission, Kirchoff's law, and the absorption factor. It explains the heat transfer through radiation, the characteristics of black and grey opaque surfaces, and the exchange of heat. The lecture also delves into the emission of energy by electromagnetic waves, the concept of quanta, and the historical background of Planck's discoveries. Additionally, it discusses the relationship between absorption and emission coefficients, the behavior of non-grey opaque bodies, and the variations in absorption and reflection coefficients for different materials.