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

  • question_answer
    In Young's experiment, light of wavelength 4000 Å is used to produce bright fringes of width 0.6 mm, at a distance of 2 meters. If the whole apparatus is dipped in a liquid of refractive index 1.5, then fringe width will be         [MP PMT 1994]

    A)            0.2 mm

    B)            0.3 mm

    C)            0.4 mm                                   

    D)            1.2 mm

    Correct Answer: C

    Solution :

               \[{{\beta }_{medium}}=\frac{{{\beta }_{air}}}{\mu }=\frac{0.6}{1.5}=0.4\ mm\].


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