Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Resolving Power

  1. Nov 17, 2004 #1
    Easy Resolving Power Problem

    Yet I can't get the answers. Can someone please help me?

    sin(Xmin) = Xmin = 1.22 (lambda/D)

    (a) Two stars are photographed utilizing a telescope with a circular aperture of diameter of 2.32 m and light with a wavelength of 461 nm. If both stars are 1022 m from us, what is their minimum separation so that we can recognize them as two stars (instead of just one)?

    d = ???? m*****

    (b) A car passes you on the highway and you notice the taillights of the car are 1.14 m apart. Assume that the pupils of your eyes have a diameter of 6.7 mm and index of refraction of 1.36. Given that the car is 13.8 km away when the taillights appear to merge into a single spot of light because of the effects of diffraction, what wavelength of light does the car emit from its taillights (what would the wavelength be in vacuum)?

    l = ???? nm*****
    Last edited: Nov 17, 2004
  2. jcsd
  3. Nov 17, 2004 #2
    nevermind i got them
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook