Refraction - How does light refract when it moves from air to water?

Light changes direction when it moves from air to water, just like a ball changes path when it rolls from a smooth road into sand.

Imagine you're playing with a toy car on the floor. It goes straight, right? Now imagine the floor suddenly turns into soft sand. The car slows down and starts moving in a different direction, not because it’s confused, but because one side of the car meets the sand first.

That's what happens to light when it moves from air to water. Air is like a smooth road for light, and water is like soft sand. One part of the light wave enters the water first, slows down, and changes direction, just like your toy car!

Think about a straw in a glass of water. It looks bent even though it's straight. That’s refraction at work. The light from the straw bends as it moves from water to air, making the straw seem crooked.

It's not magic, just light playing a little game with direction when it goes from one place to another!