Andrea's near point is 20.0 cm and her far point is 2.0 m.Her contact lenses are designed so that she can see objects that are infinitely far away.What is the closest distance that she can see an object clearly when she wears her contacts?
A)18 cm
B)22 cm
C)25 cm
D)75 cm
E)180 cm

Question

Quizplus · Accepted Answer

Andrea's contact lenses correct her vision so that her far point becomes infinity. The lenses adjust her near point proportionally. The ratio of her original near point (20 cm) to her original far point (200 cm) is the same as the ratio of her new near point to infinity. Solving for the new near point gives 22 cm.

Andrea's near Point Is 20