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How does a refractometer work?

  1. Jan 4, 2009 #1
    Could anyone explain to me how Abbe and Pulfrich refractometers work?
    They are such specific types of instrument I haven't been able to find any information detailed enough on the internet or in books.
    Does anyone know details on how they work, differences between them or a website or book which explains about them?
    Contact details of an organisation/ person who might know would also be greatly appreciated!
    Any information would be useful - thank you in advance.
     
  2. jcsd
  3. Jan 5, 2009 #2

    Andy Resnick

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    Typically they work by total internal reflection- when the critical angle is measured, the index of refraction can be calculated.
     
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