Concave Lens

Real World Example

Imagine you're trying to fit a large, fluffy pillow into a tight, narrow pillowcase. Just like how the pillowcase is thinner in the middle to accommodate and shape the pillow, a concave lens is designed with a center that is thinner than its edges to redirect light. In this analogy, the pillowcase represents the lens, guiding and focusing the pillow (light) by narrowing in the center, which mirrors how a concave lens spreads light rays outward, causing them to diverge.