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Homework Help: Finding the angular resolution

  1. May 24, 2015 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations
    θ=1.22 (λ/D)

    3. The attempt at a solution
    1.3 answer.jpg
    Just want to know if I properly answered this question.

    Thanks in advance
  2. jcsd
  3. May 24, 2015 #2


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    Homework Helper
    Gold Member

    Yes, your methodology is correct.

    The only thing I can not confirm is how you are expected to choose the typical wavelengths involved. The GMRT is capable of operating on many frequencies in different bands -- altogether the range is greater than an order of magnitude from highest to lowest wavelength. Although yes, 1 m is within that range, if you're just looking for a ballpark figure.

    Similarly, we can say the same thing about the optical wavelength (where 500 nm is typical), although it is a much narrower range (much less than 1 order of magnitude).

    So anyway, I'm guessing that your approach is fine. Your usage of the formulae is good. I think your choices of wavelengths are good for ballpark figures, but I can't say for sure that you are supposed to be looking for ballpark figures.
  4. May 24, 2015 #3

    Thank you for your detailed response
  5. May 24, 2015 #4
    I think radio wavelengths larger than 10m are blocked by the atmosphere.
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