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JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Young's Double Slit Experiment and Biprism

  • question_answer
    If a transparent medium of refractive index m = 1.5 and thickness t = 2.5 ´ 10?5 m is inserted in front of one of the slits of Young?s Double Slit experiment, how much will be the shift in the interference pattern? The distance between the slits is 0.5 mm and that between slits and screen is 100 cm                                                        [AIIMS 1999]

    A)            5 cm                                         

    B)            2.5 cm

    C)            0.25 cm                                   

    D)            0.1 cm

    Correct Answer: B

    Solution :

                       Shift in the fringe pattern \[x=\frac{(\mu -1)t.D}{d}\] \[=\frac{(1.5-1)\times 2.5\times {{10}^{-5}}\times 100\times {{10}^{-2}}}{0.5\times {{10}^{-3}}}=2.5\ cm.\]


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