When you shine a beam of red laser light on a piece of glass, it can bend in different ways. Here we present a few examples and show how to mathematically work through them using Snell's Law and geometry, rather than use thin-lense approximations.

**Problem 1** - Light bends through a prism.

**Problem 2** - Light goes into a prism, reflects inside, and then goes out at a completely different angle.

**Problem 3** - Light bends through a plano-convex lens.

**Problem 4** - Light bends through a plano-convex lens oriented the other way.