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JEE Main & Advanced Physics Ray Optics Question Bank Spherical Mirror

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    An object is placed at \[20cm\] from a convex mirror of focal length \[10\,cm.\] The image formed by the mirror is [JIPMER 1999]

    A)            Real and at \[20\,cm\] from the mirror

    B)            Virtual and at \[20\,cm\] from the mirror

    C)            Virtual and at \[20/3\,cm\] from the mirror

    D)            Real and at \[20/3\,cm\] from the mirror

    Correct Answer: C

    Solution :

                       \[u=-20\,cm,\] \[f=+10\,cm\] also \[\frac{1}{f}=\frac{1}{v}+\frac{1}{u}\]                    \[\Rightarrow \frac{1}{+10}=\frac{1}{v}+\frac{1}{(-20)}\Rightarrow v=\frac{20}{3}\,\,cm;\]virtual image.


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