A woman can see clearly only when objects are 99.0 cm or farther away from her. (a) Is she nearsighted or farsighted? nearsighted farsighted Correct: Your answer is correct. (b) Find the focal length of the appropriate corrective lens. Incorrect: Your answer is incorrect. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. cm (c) Find the power of the lens in diopters.

(a) nearsighted

(b) + 2.53

(c) 395

Explanation:

The near point of patients eye is 50.0 cm. If a person can not see objects near to it he is said to be near sighted. The women can see farther objects from 99.0 cm. She is near sighted.  Focal length is calculated by

1/f = 1/v + 1/u

u = object distance

v= image distance

f= focal length

1/f = 1/26 + 1/99

f = 2.53

Diopter is power of lens needed to focus objects. The power of diopter is  395.

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