Here I thought I knew something about music and audio, but I had no idea that the expert on the science of semiconduction to hold it all together was none other than Britney Spears! http://britneyspears.ac/lasers.htm Actually, the story of Hedy Lamar is pretty cool in the "introduction" link.
I love this: The bands in a semiconductor material are approximated by parabolic functions of k close to the bandedges. Conduction-band: (complex math) (2) Valence-band: (complex math) Illustrated: