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JEE Main & Advanced Physics Ray Optics Question Bank Photometry

  • question_answer
    A point source of 3000 lumen is located at the centre of a cube of side length 2m. The flux through one side is 

    A)            500 lumen                             

    B)            600 lumen

    C)            750 lumen                             

    D)            1500 lumen

    Correct Answer: A

    Solution :

               \[{{\varphi }_{surface}}=\frac{3000}{6}=500\ lumen.\]


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