How does the distance from a convex lens affect the image size?

When light rays pass through a convex lens, the position of the object relative to the lens significantly influences the size of the image formed. As the distance between the object and the lens decreases, the rays of light diverge more as they enter the lens, resulting in a larger image on the opposite side of the lens.

This effect occurs because a convex lens acts to converge light rays that come in from various angles. When the object is closer to the lens than its focal point, the lens produces a virtual image that is upright and larger than the object itself. As the object moves even closer to the lens, the image continues to grow larger.

In contrast, when the object is positioned farther from the lens, particularly beyond the focal point, the size of the image usually decreases, especially as the object moves towards infinity, where the image approaches the size of the focal point image. Thus, moving closer to the lens is linked with an increase in image size.