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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1996

  • question_answer
    On placing a mica sheet of thickness t and refractive index\[\mu \] in the path of first ray producing the interference, by what amount the fringe pattern shifts towards:

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

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

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

    D)        \[\frac{D}{d}(\mu -1)\]

    Correct Answer: B

    Solution :

    On placing a mica sheet of thickness t and refracting index \[\mu \]. Displacement in fringe displacement                 \[=\frac{D}{d}(\mu -1)t\]


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