The Science of Rainbows

Have you ever seen a rainbow after the rain? Rainbows are beautiful colors in the sky. But what makes a rainbow?

What Makes a Rainbow?

A rainbow happens when sunlight shines through raindrops. The sunlight looks white, but it is really made of all the colors you see in a rainbow! These colors are red, orange, yellow, green, blue, indigo, and violet.

When sunlight goes into a raindrop, the light bends. This is like when you put a straw in a glass of water, and it looks like the straw is bent. The raindrop bends the light and separates it into all the colors.

How Do We See Rainbows?

After the light is separated, it bounces off the back of the raindrop. Then, the colors come out of the raindrop and travel to our eyes. Because each raindrop sends only one color to your eye, you need many raindrops to see a full rainbow!

To see a rainbow, the sun needs to be behind you, and the rain needs to be in front of you. That is why you often see rainbows in the morning or late afternoon.

Rainbow Facts

• Rainbows are always in the shape of an arc.
• Sometimes, you can see a double rainbow! This happens when the light bounces twice inside the raindrops.
• Everyone sees a slightly different rainbow because each person is in a different place.

So, the next time you see a rainbow, remember the science that makes it so special!