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

  • question_answer
    A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens was 4 D, the power of a cut lens will be [MP PMT 1999]

    A)            2 D

    B)            3 D

    C)            4 D

    D)            5 D

    Correct Answer: A

    Solution :

               \[P={{P}_{1}}+{{P}_{2}},\] if \[{{P}_{1}}={{P}_{2}}={P}'\] Þ \[{P}'=P/2=2D.\]


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