In class we derived the interferencepattern for a pah of ver
     In class we derived the interferencepattern for a pah of very thin slits, and the diffractionpattern for a slit of finite width.  Now. derive the intensity function for a pair of slits of width a whose centers are separated by distance d. The result is given in equation 36.12 in your text. You may want to refer to the derivation of the one-slit diffraction pattern from your class notes. Use the coordinate system shown below.  Sketch this function for the case where d = 4a. 
  
  Solution
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