Starting from very far away,an object is moved closer and closer to a converging lens,eventually reaching the lens.What happens to its image formed by that lens? (There could be more than one correct choice. )
A)The image gets closer and closer to the lens.
B)The image gets farther and farther from the lens.
C)The image eventually changes from virtual to real.
D)The image eventually changes from real to virtual.
E)The image keeps getting larger and larger.

Question

Quizplus · Accepted Answer

As the object gets closer to the converging lens, the image formed by the lens moves away from the lens and becomes larger. At a certain point, the image changes from real to virtual, and the distance between the lens and the image decreases. This means that the image is now formed behind the lens, rather than in front of it. As the object continues to move closer to the lens, the image continues to move closer to the lens and becomes smaller. Eventually, the image disappears when the object is at the focal point of the lens. After that, the image becomes virtual again, and moves away from the lens as the object gets closer to it. Therefore, D is the correct answer, as the image eventually changes from real to virtual.

Starting from Very Far Away,an Object Is Moved Closer and Closer