Lecture 24: Matter and Light
How do matter and light interact? This lecture is the first of two that\nwill explore the interaction between light and ordinary matter, and how\nwe measure that with spectroscopy. This lecture introduces the idea of\ninternal energy as quantified by the temperature on the Absolute Kelvin\nscale, and Kirchoff's empirical Laws of Spectroscopy. We will deal\nprimarily with blackbody spectra emitted by hot solids or hot dense\ngasses or liquids, the Stefan-Boltzmann and Wien Laws, and introduce\nemission and absorption line spectra. The next lecture will explain how\nline spectra arise from atoms and molecules. Recorded 2007 Oct 24 in\n1000 McPherson Lab on the Columbus campus of The Ohio State University.