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A farsighted person cannot focus distinctly objects closer than 100cm. The lens that will permit him to read from a distance of 50cm, will have a focal length:

0 2 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • V

    Answered by

    Vishal Baghel | Contributor-Level 10

    a month ago

    1 f = 1 v − 1 u

    ⇒ 1 f = 1 − 1 0 0 − 1 − 5 0 = 1 5 0 − 1 1 0 0

    ⇒ f = + 1 0 0 c m

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