General Physics: Quantum - Black Body Radiation and Planck Theory

This lecture covers the quantum nature of radiation, black body radiation, and the Planck theory. It delves into the historical context of classical physics limitations, the practical realization of cavity radiation, and the relationship between electromagnetic density and wavelength. The instructor explains the concept of black bodies, the spectral distribution of electromagnetic density, and the deviations from Planck's spectrum. Additionally, the lecture explores the equipartition theorem, the classic Rayleigh-Jeans law, and the Planck oscillator's energy spectrum. Practical examples such as the spectrum of the Sun and cosmic radiation are also discussed.