Lecture 24: Matter and Light
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How do matter and light interact? This lecture is the first of two that
will explore the interaction between light and ordinary matter, and how
we measure that with spectroscopy. This lecture introduces the idea of
internal energy as quantified by the temperature on the Absolute Kelvin
scale, and Kirchoff's empirical Laws of Spectroscopy. We will deal
primarily with blackbody spectra emitted by hot solids or hot dense
gasses or liquids, the Stefan-Boltzmann and Wien Laws, and introduce
emission and absorption line spectra. The next lecture will explain how
line spectra arise from atoms and molecules. Recorded 2007 Oct 24 in
1000 McPherson Lab on the Columbus campus of The Ohio State University.
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