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Homework Help: Angular resolution

  1. Jan 26, 2013 #1
    Technological advances are now making it possible to link visible-light telescopes so that they can achieve the same angular resolution as a single telescope over 300 meters in size.

    What is the angular resolution (diffraction limit) of such a system of telescopes for observations at a wavelength of 500 nanometers?

    I was wondering if anyone has an idea on what the angular resolution formula is, I know there is one but I can't recall it..and when it says 500 nm it's 5.00*10^-9 m right? Been a while since I've dealt with waves.
  2. jcsd
  3. Jan 26, 2013 #2


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    Why struggle with recollection when you can "look it up"? Try your favorite search engine, wiki, etc.
    No, that would be 5nm. 1nm = 1*10-9 m.
  4. Jan 26, 2013 #3
    ^ Yeah sorry i meant -7 lol and I still can't figure it out, I need the diameter of the telescope or something... I think the formula is sin theta = 1.220 * wavelength/ diameter but I have no clue how to get the diameter?
  5. Jan 27, 2013 #4


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    How big was the single telescope? Hint: when you talk about the size of a telescope, you are talking about the diameter of the mirror which collects the incoming light.
  6. Jan 27, 2013 #5
  7. Jan 27, 2013 #6
    nvm got it
    Last edited: Jan 28, 2013
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