What is the near point of a farsighted person who can read a newspaper held 25 cm from his eyes when he wears 3.33 diopters glasses?
A) 1.5 m
B) 0.50 m
C) 1.9 m
D) 0.75 m
E) 0.60 m

Question

Quizplus · Accepted Answer

The near point of a farsighted person is the closest distance at which they can see clearly. When the person is wearing glasses, the near point is given by the formula:1/near point = 1/focal length of glasses + 1/near point without glassesIn this case, the focal length of the glasses is 1/3.33 = 0.3 m, and the near point without glasses is 25 cm = 0.25 m. Plugging these values into the formula, we get:1/near point = 1/0.3 + 1/0.251/near point = 3.33 + 41/near point = 7.33near point = 1/7.33 = 0.136 m = 13.6 cmTherefore, the near point of the farsighted person is 13.6 cm.

What Is the near Point of a Farsighted Person Who