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Homework Help: Two slits

  1. Feb 27, 2010 #1
    1. The problem statement, all variables and given/known data
    Two slits are separated by 0.260 mm. A beam of 500 nm light strikes the slits, producing an interference pattern. Determine the number of maxima observed in the angular range -31.0° < θ < +31.0°.


    2. Relevant equations
    i used dsinθ = m(lambda)


    3. The attempt at a solution
    i used the formula above and got
    (.26 x 10^-3)sin(31) = m (500 x 10^-9)

    i got m as 267.82, but since there are 267.82 maxima to the right, and 267.82 to the left and one at m=0, that makes for a total number of 536.64 maxima

    ???
     
  2. jcsd
  3. Feb 27, 2010 #2
    bump to the top

    i need to know what if i did anything wrong, or if the book is wrong
     
  4. Feb 27, 2010 #3
    Hello hodgepodge.The number of maxima must be a whole number eg you may get 267 maxima on one side but not 267.82.
     
  5. Feb 27, 2010 #4
    werd, thanks
     
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