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JEE Main & Advanced Sample Paper JEE Main Sample Paper-39

  • question_answer
    A sphere is placed in front of a convex lens of focal length f. The radius of the sphere is much smaller compared to f. The image of the sphere would look spherical if the object  distance is

    A)  f                                 

    B)  \[\frac{3f}{2}\]

    C)  2 f                              

    D)   \[\frac{f}{2}\]

    Correct Answer: C

    Solution :

     Lateral magnitude = v/u; Mag. along axis \[=\left| \frac{dv}{du} \right|=\frac{{{u}^{2}}}{{{v}^{2}}}=1\] if v = u, \[\therefore \] u =


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