A given individual is unable to see objects clearly when they are beyond 75 cm.What focal length contact lens should be used to correct this problem?
A) 75 cm
B) −75 cm
C) −100 cm
D) −33.3 cm

Question

Quizplus · Accepted Answer

The focal length of the contact lens should be negative to correct nearsightedness. The focal length of the contact lens should be equal to the distance at which the person can see clearly, which is 75 cm. Therefore, the focal length of the contact lens should be -75 cm.

A Given Individual Is Unable to See Objects Clearly When