RAJASTHAN PMT Rajasthan - PMT Solved Paper-2003

  • question_answer
    If a mica sheet of thickness t and refractive index \[\mu .\] is placed in the path of one of interfering beam in a double slit experiment then displacement of fringes will be                           

    A)  \[\frac{D}{d}\mu t\]                     

    B)         \[\frac{D}{d}(\mu -1)t\]

    C)  \[\frac{D}{d}(\mu +1)t\]             

    D)         \[\frac{D}{d}({{\mu }^{2}}-1)t\]

    Correct Answer: B

    Solution :

    When a mica sheet is introduced in the path of one of interfering beams, the whole interference pattern is displaced by an amount \[\frac{D}{d}(\mu -1)t\]in the direction of introduction of sheet.


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