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The same laser was shone on a film with two slits. On a screen 2.0 m...

  1. The same laser was shone on a film with two slits. On a screen 2.0 m from the film, the first bright band was 1.4 cm from the center. Calculate the distance between the slits using the average wavelength from the diffraction grating data wavelength 1= 647.06nm , wavelength 2= 636.6 nm.
  2. The distance from the center to the second bright band is 2.9 cm. Calculate the distance between the slits.  
  3. Find the percent difference between your results for the distance between the slits.
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