A convex lens has focal length f.If an object is located at "infinity" (very far away),the image formed is located at a distance from the lens
A)of 2f.
B)between f and 2f.
C)of f.
D)between the lens and f.
E)of infinity.

Question

Quizplus · Accepted Answer

When an object is very far away (at infinity), the incoming parallel rays of light are focused by a convex lens at a point known as the focal point. The distance between the lens and the focal point is the focal length of the lens, denoted by f. Therefore, the image formed by a convex lens when the object is at infinity is located at a distance equal to the focal length (f) of the lens. Hence the correct option is (C) of f.

A Convex Lens Has Focal Length F