Manipal Engineering Manipal Engineering Solved Paper-2012

  • question_answer
    Power of a lens is\[-4\,\,D\]and for second lens, power is\[+2D;\]the total power of the couple is

    A) \[-2\,\,D\]                          

    B) \[6\,\,D\]

    C) \[-6\,\,D\]          

    D)        \[-8\,\,D\]

    Correct Answer: A

    Solution :

    Total power                 \[P={{P}_{1}}+{{P}_{2}}\]                 \[P=-4D+2D\]                 \[P=-2D\]


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