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Homework Help: Physics Grammer

  1. Feb 9, 2010 #1
    1. The problem statement, all variables and given/known data

    So i'm starting to write a lab report but I've hit a boundary in that I have inflicting opinions on what the plural of 'refractive index' is. I have some people saying 'refractive indices' and others saying 'refractive indicies' and a few people saying 'refractive indexes'. I'm pretty sure it's not the latter but i have no idea which of the first two. Spelling really does matter in this thing.

    Thanks in advance
  2. jcsd
  3. Feb 9, 2010 #2
    It's index - indices (in American and Canadian)
    It may vary in different versions of English.
    And by the way, it's actually "grammar".
  4. Feb 9, 2010 #3
    hahahaha. Oh the irony. Thanks a lot for the answer!
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