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Homework Help: Neon laser grade 12 physics

  1. Aug 27, 2012 #1
    A single slit is illuminated with a helium-neon laser whose wavelength is 633 nm. If the slit width is 2.2 x 10 e-5 m, calculate the position of the third maximum in degrees

    2. Relevant equations

    Sin Theta(m) = (m + 0.5) Lambda/w

    3. The attempt at a solution

    Sin Theta(3) = (3 + 0.5)(633 x 10 e-9)/2.2 x 10 e-5
    =(3.5)(633 x 10 e-9)/2.2 x 10 e-5

    Theta(3) = sin-1(0.1)
    =5.7 degrees

    Therefore, the position of the third maximum is at 5.7 degrees

    is this right?!
  2. jcsd
  3. Aug 27, 2012 #2


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    That looks good to me.
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