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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2009

  • 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)  100 cm                

    D)         10 cm

    Correct Answer: B

    Solution :

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


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