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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2006

  • question_answer
    The power of lens used by a short-sighted person is -2 D. Find the maximum distance of an object, which he can see without spectacles

    A)  25 cm                                  

    B)  50 cm

    C)  100cm                                 

    D)  10cm

    Correct Answer: B

    Solution :

    \[P=-2D\] Focal length of the lens \[(f)=\frac{1}{P}\]                                                 \[=\frac{1}{-2}m=-\frac{100}{2}cm\]                                                 \[=-50cm.\] Therefore, person can see up to distance \[50cm.\]


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