What is the power in D of the eyes of a woman who can see an object clearly at a distance of only 9.5 cm

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What is the power in D of the eyes of a woman who can see an object clearly at a distance of only 9.5 cm

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Farah 5 years 2021-07-31T06:39:37+00:00 1 Answers 37 views 0

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  1. Adela
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    2021-07-31T06:40:54+00:00
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    Answer:

    Explanation:

    It is the far point an myopic person . For it she uses concave lens . For her ,

    object distance u = infinity

    image v = – 9.5 cm

    f = ?

    form the lens formula

    \frac{1}{f} = \frac{1}{v} - \frac{1}{u} \\

    \frac{1}{f} = \frac{1}{-9.5} - 0 \\

    f = – 9.5 cm  = – 9.5 / 100 m

    P = 1 /f = – 100 / 9.5 =  – 10.52 D .

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