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You meet a person with prescription glasses of +0.55 dpt.

What is the near point of this person? Express the result as a positive number!

Hint: the near point of a healthy person is 25 cm. An object placed at this distance will form an image at the near point of the person.

  • Physics - ,

    use the thin lens formula:

    1/f=(1/p) + (1/q)

    To find f: 1/f = 0.55dpt
    p is 0.25m.
    then find q, which is the near point.

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