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JEE Main & Advanced Physics Question Bank Human Eye and Lens Camera

  • question_answer
    The light gathering power of a camera lens depends on  [DCE 2003]

    A)            Its diameter only

    B)            Ratio of focal length and diameter

    C)            Product of focal length and diameter

    D)            Wavelength of light used

    Correct Answer: A

    Solution :

               Light gathering power µ Area of lens aperture or d2


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