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Homework Help: Young's Double-Slit Experiment

  1. Feb 8, 2014 #1
    1. The problem statement, all variables and given/known data
    When two parallel slits are illuminated with monochromatic light of wavelength 632.8 nm, the angle between the center of the central maximum and the center of the second side maximum is .45 degrees. What is the distance between the parallel slits.

    2. Relevant equations

    d sin θ = n λ

    3. The attempt at a solution

    d=2(632.8 nm)/sin 45 degrees

    d = 1487.36 nm

    My "d" value seems a bit odd, so I wanted to make sure I did this correctly. Note that I assigned "2" as the value of n because the problem said "second side maximum". Thank you.
  2. jcsd
  3. Feb 8, 2014 #2


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    2017 Award

    Staff: Mentor

    .45 degrees and 45 degrees are not the same thing. Apart from that (and the resulting wrong value for d), it looks fine.
  4. Feb 8, 2014 #3
    Okay. Thank you for the confirmation!
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