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JEE Main & Advanced Physics Ray Optics Question Bank Spherical Mirror

  • question_answer
    An object of length 6 cm is placed on the principle axis of a concave mirror of focal length f at a distance of 4f. The length of the image will be                                                        [MP PET 2003]

    A)            2 cm                                         

    B)            12 cm

    C)            4 cm                                         

    D)            1.2 cm

    Correct Answer: A

    Solution :

               \[\frac{I}{O}=\frac{f}{f-u}\]\[\Rightarrow \frac{I}{+6}=\frac{-f}{-f-(-4f)}\]\[\Rightarrow I=-\,2\,cm.\]


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