RAJASTHAN PMT Rajasthan - PMT Solved Paper-2005

  • question_answer
    The dimensional formula of light year is:

    A)  \[[{{L}^{-1}}]\]                                 

    B)  \[[{{T}^{-1}}]\]

    C)  \[[L]\]                 

    D)         \[[T]\]

    Correct Answer: C

    Solution :

    As we know that the light year is the distance which is measured in metre. It is distance travelled by light in one year. \[\begin{align}   & =3\times {{10}^{8}}\times 365\times 24\times 60\times 60 \\  & =9.5\times {{10}^{15}}m \\ \end{align}\] Hence, the dimension of light year is L


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