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JEE Main & Advanced Physics Ray Optics Question Bank Refraction at Curved Surface

  • question_answer
    A concave and convex lens have the same focal length of 20 cm and are put into contact to form a lens combination. The combination is used to view an object of 5 cm length kept at 20 cm from the lens combination. As compared to the object, the image will be                                       [CPMT 1986; RPMT 1997]

    A)            Magnified and inverted  

    B)            Reduced and erect

    C)            Of the same size as the object and erect

    D)            Of the same size as the object but inverted

    Correct Answer: C

    Solution :

                       Resultant focal length =\[\infty \]            \[\therefore \] It behaves as a plane slab of glass.


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