Radiative Properties: Rayleigh and Mie Scattering

This lecture covers the radiative properties of small and large particles, focusing on Rayleigh and Mie scattering. The instructor begins by discussing the absorption and scattering efficiency factors, emphasizing their dependence on the size parameter, which is the ratio of the wavelength to the particle size. The lecture includes examples, such as the burning of propane, to illustrate how to calculate these factors. The instructor explains the significance of wavelength dependency in scattering phenomena, particularly during sunset, where Rayleigh scattering causes the sun to appear red. The transition from Rayleigh to Mie scattering is also addressed, highlighting the differences in behavior for particles of varying sizes. The instructor provides insights into the geometrical optics limit for large opaque spheres and discusses the implications of scattering phase functions. Throughout the lecture, the instructor encourages students to engage with the material and seek clarification on complex concepts, ensuring a comprehensive understanding of the topic.