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BCECE Engineering BCECE Engineering Solved Paper-2009

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

    A)  \[2\pi \] lumen                                

    B)  \[4\pi \] lumen

    C)  \[6\pi \] lumen                

    D)         \[8\pi \] lumen

    Correct Answer: D

    Solution :

    Given, \[L=2\,cd\] The light flux \[\phi \text{=}\,\text{4}\pi L\]                 \[=4\pi \times 2\] \[\phi \text{=}\,8\pi \]lumen


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