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

  • question_answer What is the effect on Fresnel?s biprism experiment when the use of white light is made                [RPMT 1998]

    A)            Fringe are affected

    B)            Diffraction pattern is spread more

    C)            Central fringe is white and all are coloured

    D)            None of these

    Correct Answer: C

    Solution :

               With white light, the rays reaching the centre has zero path difference. So we get white fringe at the centre and coloured near the central fringe.

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