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NEET Sample Paper NEET Sample Test Paper-90

  • question_answer
    A student when discussing the properties of a medium (except vacuum) writes: Velocity of light in vacuum = velocity of light in medium. This formula is

    A) dimensionally correct

    B) dimensionally incorrect

    C) numerically incorrect

    D)  Both [a] and [c]

    Correct Answer: D

    Solution :

    [d] The formula can be written as\[\frac{\text{velocity of light in vacuum}}{\text{velocity of light in medium}}=1\] This formula is dimensionally correct as both the sides are dimensionless. Numerically, this ratio is equal to refractive index which is > 1. Hence, the equation is numerically incorrect.


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