Heat Transfer: Conduction and Diffusion

This lecture discusses the three mechanisms of heat transfer, focusing on conduction and diffusion, and deriving Fourier's law to describe them. It explains how heat can be transferred through conduction, convection, and radiation, using examples like a light bulb and the transfer of heat between objects at different temperatures. The lecture also covers thermal conduction, defining it as the transfer of thermal energy within objects with temperature differences, and introduces the concept of thermal conductivity. Different materials' thermal conductivities are compared, highlighting how materials like copper are good conductors while air is a poor conductor, making it a good insulator. The lecture concludes by discussing how various materials can be used to insulate buildings.