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

  • question_answer
    A camera objective has an aperture diameter d. If the aperture is reduced to diameter \[d/2,\] the exposure time under identical conditions of light should be made  [Kerala PMT 2004]

    A)            \[\sqrt{2}\]fold                   

    B)            2 fold

    C)            \[2\sqrt{2}\]fold                 

    D)            4 fold

    Correct Answer: D

    Solution :

               Time of exposure \[\propto \frac{1}{{{(Aperture)}^{2}}}\]


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