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Homework Help: Single Slit problems

  1. Jan 15, 2015 #1
    1. The problem statement, all variables and given/known data
    At what angle will 750nm light produce a second minimum if the single-slit width is 2.0um
    2. Relevant equations

    3. The attempt at a solution
    This is what I got so far

    I dont understand why I keep getting error on my calculator, what am I doing wrong here please help
  2. jcsd
  3. Jan 15, 2015 #2
  4. Jan 15, 2015 #3


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    Science Advisor
    Homework Helper
    Gold Member

    It's because you are asking for an angle with sin > 1.
    Where do you get 3x10^-6 from?
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