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Simple question about optics

  1. Mar 31, 2009 #1
    1. The problem statement, all variables and given/known data
    If I have a light source and a lens then I would take the object distance to be the distance between the center of the lens and the light source. But if I were to place a slit between the light source and the lens, would the object distance now be the distance between the slit and the center of the lens?

    I think the object distance would change as the light diffracts out from the slit.
     
  2. jcsd
  3. Mar 31, 2009 #2

    Redbelly98

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    Yes; the slit may be considered to be a light source in that situation.
     
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