2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Ray Optics

JEE Main & Advanced Physics Ray Optics Question Bank Spherical Mirror

  • question_answer
    An object \[1cm\] tall is placed \[4cm\] infront of a mirror. In order to produce an upright image of \[3cm\] height one needs a                                                      [SCRA 1994]

    A)            Convex mirror of radius of curvature \[12cm\]

    B)            Concave mirror of radius of curvature \[12cm\]

    C)            Concave mirror of radius of curvature \[4cm\]

    D)            Plane mirror of height \[12cm\]

    Correct Answer: B

    Solution :

                       Erect and enlarged image can produced by concave mirror.                    \[\frac{I}{O}=\frac{f}{f-u}\Rightarrow \frac{+\ 3}{+1}=\frac{f}{f-(-\ 4)}\Rightarrow f=-\ 6\,cm\]            \[\Rightarrow R=2f=-\,12\,cm\]


You need to login to perform this action.
You will be redirected in 3 sec spinner