JEE Main & Advanced Physics Ray Optics Question Bank Spherical Mirror

  • question_answer The focal length of a concave mirror is \[50cm.\] Where an object be placed so that its image is two times and inverted

    A)            75 cm                                      

    B)            72 cm

    C)            63 cm                                      

    D)            50 cm

    Correct Answer: A

    Solution :

                       For real image m = ? 2,     so by using \[m=\frac{f}{f-u}\]            \[\Rightarrow -\ 2=\frac{-\,50}{-50-u}\Rightarrow u=-\ 75\ cm\]


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