Here's why:
* Refraction: This is the bending of light as it passes from one medium to another (like from air to glass). A converging lens is thicker in the middle than at the edges. This curved shape causes light rays to bend inward as they pass through the lens.
* How it works: The speed of light changes as it moves from air to glass. This change in speed causes the light to bend. Because of the lens's shape, the bending causes rays of light to converge (come together) at a focal point.
Let me know if you'd like a diagram to illustrate this!
