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Johnjbarton (talk | contribs) →Bandgap: Moss' 1985 paper gives a good summary. The more recent Gomaa etal work is hard to read and seems to be mainly data fitting. |
Marcopalis (talk | contribs) m →Complex refractive index: First definition of complex refractive index was wron and inconsistent with text further down |
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When light passes through a medium, some part of it will always be [[attenuation|absorbed]]. This can be conveniently taken into account by defining a complex refractive index,
<math display="block">\underline{n} = n
Here, the real part {{mvar|n}} is the refractive index and indicates the [[phase velocity]], while the imaginary part {{mvar|κ}} is called the '''extinction coefficient'''<ref name=DresselhausMITCourse>{{cite web
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