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JEE Main & Advanced Physics Ray Optics Question Bank Spherical Mirror

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    A concave mirror is used to focus the image of a flower on a nearby well \[120cm\] from the flower. If a lateral magnification of \[16\] is desired, the distance of the flower from the mirror should be                                 [MP PET 1986]

    A)            \[8cm\]                                  

    B)            \[12cm\]

    C)            \[80cm\]                                

    D)            \[120cm\]

    Correct Answer: A

    Solution :

                       Let distance \[=u.\] Now \[\frac{v}{u}=16\] and \[v=u+120\]            \[\therefore \,\,\frac{120+u}{u}=16\Rightarrow 15u=120\Rightarrow u=8\,cm\].


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