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Interference - Finding distance between slits

  1. Apr 1, 2009 #1
    1. The problem statement, all variables and given/known data
    A laser is shone through a set of slits and onto a screen.
    I have a Δy vs. L graph plotted, where Δy is the spacing between successive nodes, and L is the distance from the slits to the screen. I'm supposed to find the spacing between the center of the slits. The value of λ is given.


    2. Relevant equations
    Δy = λL/D
    y is the spacing between successive nodes
    L is the distance from the slits to the screen
    D is the spacing between the center of the slits

    3. The attempt at a solution
    I have the slope, but I don't know where to go from there...
    I'm thinking that the slope will be equal to λ/D? and if I know λ, then I can calculate D. Not sure if this is the right way to go though.
     
    Last edited: Apr 1, 2009
  2. jcsd
  3. Apr 1, 2009 #2

    Redbelly98

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    Yes, that's right.
     
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