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Johnjbarton (talk | contribs) →Complex refractive index: name ref for reuse, add to the defined term with page number. |
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<math display="block">\underline{n} = n + i\kappa.</math>
Here, the real part {{mvar|n}} is the refractive index and indicates the [[phase velocity]], while the imaginary part {{mvar|κ}} is called the '''
|url = http://web.mit.edu/course/6/6.732/www/6.732-pt2.pdf
|title = Solid State Physics Part II Optical Properties of Solids
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