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Homework Help: Focal Length of a Lens

  1. Apr 25, 2010 #1
    What is the focal length of a thin, flat piece of glass with no curvature?

    I found that the power is 0 diopters, but I don't know what the focal length is.
  2. jcsd
  3. Apr 25, 2010 #2
    What do you think? What is the focal length?
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