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    Question

    What is the unit of the refractive

    index?
    A Metre per second Correct Answer Incorrect Answer
    B Radian Correct Answer Incorrect Answer
    C Ohm Correct Answer Incorrect Answer
    D None of the above Correct Answer Incorrect Answer

    Solution

    The refractive index is a dimensionless quantity that measures how much light bends when it passes from one medium to another. Since it is a ratio of speeds, it has no units.

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