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Haryana PMT Haryana PMT Solved Paper-1999

  • question_answer
    An isotropic source of 2 candela produces            light flux equal to :

    A)  8\[\pi \] lumen                

    B)  16\[\pi \] lumen

    C)  4\[\pi \] lumen                

    D)  \[\pi \]lumen

    Correct Answer: A

    Solution :

                    Intensity \[I=2\]candela Hence, flux is given by \[F=4\pi \,l=4\pi \times 2=8\pi \] lumen


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