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Is there a special term for refractive indices when 1 is subtracted?

  1. Mar 10, 2013 #1
    I have been doing a bit of studying for my optics course and I have often come across refractive indices or materials being presented as n-1 (which often makes a lot of sense). I was just wondering if there was a special term like for this format or if we still call it just the "refractive index"?

    Sorry if this is in the wrong section, it's not directly for homework although I will probably use it for homework. It's more just for my own information.

    thanks!
     
  2. jcsd
  3. Mar 11, 2013 #2

    DrDu

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