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Inclined Glass Wedge Diffraction - Help !

  1. Apr 21, 2012 #1
    1. The problem statement, all variables and given/known data
    Monochromatic beam of incident light on the surface of the glass wedge,
    whose upper edge is inclined at an angle of γ = 0.05 ° from the base. In reflected light
    observe a number of interference fringes, the distance between adjacent
    dark streaks is △X = 0.21 mm. Calculate the wavelength λ of the incident light.
    Refractive index of glass n = 1.5.


    2. Relevant equations
    [tex] d \sin \alpha = n \lambda [/tex]


    3. The attempt at a solution
    I need a guidance ! Is it a thin-film problem ?
     
  2. jcsd
  3. Apr 21, 2012 #2

    rude man

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    Need a picture of this setup.
     
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