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BVP Medical BVP Medical Solved Paper-2000

  • question_answer
    Interference was observed in interference chamber when air was present, now the chamber was evacuated and if the same light is used, a careful observer will see :

    A)  interference with bright band

    B)  interference with dark band

    C)  interference in which width of the fringe will be slightly increased

    D)  interference with dark bands

    Correct Answer: C

    Solution :

                    We know that the refractive,-index of air is slightly more than 1. When air is evacuated, refractive index decreases and hence, the wavelength increases and the fringe width also increases.


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