JEE Main & Advanced Physics Ray Optics Question Bank Photometry

  • question_answer
    Lux is equal to                                                                 [CPMT 1993]

    A)            1 lumen/m2                          

    B)            1 lumen/cm2

    C)            1 candela/m2                       

    D)            1 candela/cm2

    Correct Answer: C

    Solution :

               \[I=\frac{L}{{{r}^{2}}}\]


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