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Homework Help: Resolution for a lens from a diffraction standpoint

  1. Apr 10, 2013 #1
    1. The problem statement, all variables and given/known data
    A lens is designed to work in the visible, near-infrared, and near-ultraviolet. The best resolution of this lens from a diffraction standpoint is

    a.) the same for all wavelengths.
    b.) in the near-ultraviolet.
    c.) indeterminate.
    d.) in the near-infrared.
    e.) in the visible.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 10, 2013 #2
    do you know how diffraction depends on wavelength
  4. Apr 10, 2013 #3
    shorter wavelengths get diffracted at greater angles?
    Last edited: Apr 10, 2013
  5. Apr 10, 2013 #4
    So would it be near-infrared because it has the longest wavelength, therefore less diffraction?
  6. Apr 10, 2013 #5
    for a lens of a given SIZE you get less diffraction for a short wavelength !!!
    think about it
    Which has the shortest wavelength?
  7. Apr 10, 2013 #6
    Ultraviolet would have the shortest
  8. Apr 10, 2013 #7
    That is correct so all other things being equal there is less diffraction for UV, visible and infra red in that order.
  9. Apr 10, 2013 #8
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