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Homework Help: Inverse Law

  1. Feb 26, 2006 #1
    iam doing an investigation on the inverse law using light. i want to know why can a flourescent tube act a line source? why is it that when you get too far the is acts a point source?

    i look forward to your response
  2. jcsd
  3. Feb 26, 2006 #2
    inverse what law? inverse square?
    your answer seems to be in calculus of the problem. try putting infinity for distance, and compare the result with point source's equation.
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