Here's why:

* Convex lenses are thicker in the middle than at the edges. This curvature causes light rays to converge (come together) after passing through the lens.

* This convergence makes objects appear larger and closer than they actually are.

You can see convex lenses at work in:

* Magnifying glasses: These are designed to magnify objects.

* Telescopes: The objective lens in a telescope is convex, focusing light from distant objects to create a magnified image.

* Cameras: The lens in a camera focuses light onto the sensor, and a convex lens is often used to achieve this.

Let me know if you have any other questions!