What is dispersion?

Dispersion is when different parts of something move at different speeds, causing them to spread out.

Imagine you're on a merry-go-round. When it starts spinning slowly, everyone moves together, you, your friend, and the horse you're riding. But if the merry-go-round suddenly goes faster, you might feel like you're being pulled apart from your friend because you’re all moving at different speeds now. That’s dispersion in action!

Think about when you drop a stone into a calm pond. The water ripples outwards, and the waves spread out, that's dispersion too! Each wave moves slightly differently, so they don’t all stay together.

Or picture a group of kids running down a hallway. If one kid runs faster than the others, they'll start to spread apart, just like how dispersion works in water or light.

Now imagine sunlight going through a glass prism, like a rainbow filter. The white light is made up of different colors, and each color moves at its own speed inside the glass. Because of that, they spread out into a beautiful rainbow, that’s dispersion in light!