Electromagnetic Fields in Medium

This lecture covers the concept of electromagnetic fields in a medium, including the macroscopic Maxwell equations, polarization, and magnetization. The instructor explains the transition from microscopic to macroscopic Maxwell equations, spatial averages, and the relationship between electric and magnetic fields. The lecture delves into the macroscopic Maxwell equations, free and bound charges, and the concept of charge conservation. It also discusses the origins of dielectric permittivity and the importance of random orientation in materials. The instructor emphasizes the linear, local, isotropic, and homogeneous nature of materials in electromagnetic fields.