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MGIMS WARDHA MGIMS WARDHA Solved Paper-2013

  • question_answer
    A convex lens makes a real image of 4 cm long on a screen when the lens is shifted to a new position without disturbing the object or the screen, we get a real image on the screen, which is 16 cm long, then the length of the object is

    A)  \[g/4\text{ }cm\]                           

    B)  8 cm

    C)  \[2g/3\]              

    D)  2 cm

    Correct Answer: B

    Solution :

                    From displacement method, the length of object is given by \[O=\sqrt{{{I}_{1}}{{I}_{2}}}=\sqrt{4\times 16}=\sqrt{64}=8\,cm\]


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