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JEE Main & Advanced Physics Ray Optics Question Bank Spherical Mirror

  • question_answer
    The image formed by a convex mirror of focal length \[30cm\] is a quarter of the size of the object. The distance of the object from the mirror is

    A)            \[30cm\]                                

    B)            \[90cm\]

    C)            \[120cm\]                              

    D)            \[60cm\]

    Correct Answer: B

    Solution :

               \[m=\frac{f}{(f-u)}\Rightarrow \left( +\frac{1}{4} \right)=\frac{(+30)}{(+30)-u}\Rightarrow u=-\ 90\ cm\]


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