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JIPMER Jipmer Medical Solved Paper-1997

  • question_answer
    A converging lens of focal length 1 m is placed in the contact with a diveiging lens of focal length 1 m. The power of the combination is:

    A)  0                                            

    B)  + 2                        

    C)  +1                         

    D)         \[\infty \]

    Correct Answer: A

    Solution :

    The power combination of lenses is given by \[D={{D}_{1}}+{{D}_{2}}\] \[=\frac{1}{1}D-\frac{1}{1}D=0\] (Because diverging lens has negative focal length)


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