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Double Slit Interference
BlackBoard Notes

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blackboard image

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d ≡ distance between centers of slits

Plot xn vs. n, apply a linear fit.

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  Image of Slits Projected on the Wall

separation

Set up a proportion:

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  1. Uncertainty in wavelength due to uncertainty in slope (use Δm from your graph):
  2. Uncertainty in slit spacing (where Δdwall comes from your measurements of dwall):

    eqn


  1. Uncertainty in wavelength due to uncertainty in slit spacing:
  2. Calculate uncertainty in wavelength:

 

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Revised: 21 Mar 2022 Canton, NY 13617