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Single Slit problems

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  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
    Sin(theta)=n(lambda)/w

    3. The attempt at a solution
    This is what I got so far
    (theta)=sin-1(3x10^-6/2x10^-6)

    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

    haruspex

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