Thermal Physics: Temperature and Matter Properties

This lecture covers the concepts of temperature, thermal properties of matter, diffusion, thermal expansion, specific heat, and phase changes. It explains the measurement of temperature using thermometers, the relationship between temperature scales, and the concept of energy transfer through heat. The lecture also delves into the microscopic origin of heat, the diffusion of substances in air, and thermal expansion with examples. Additionally, it discusses the movement of molecules, the Wiener process, and the concept of diffusion constant. The presentation concludes with the explanation of thermal expansion and the linear relationship between temperature and the dimensions of a material.