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Terminology problem

  1. Jan 3, 2008 #1
    Please tell me what is the name of a length which is not a proper one and of a time interval which is not a proper one.
  2. jcsd
  3. Jan 3, 2008 #2
    They are respectively "coordinate length" and "coordinate time". You can find these in most relativity books.
  4. Jan 3, 2008 #3

    Thanks. Please give me some quotations.
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