Can you ever touch or reach the end of a rainbow?

In one line

The rule

A rainbow is formed when sunlight bends, reflects, and spreads out inside raindrops, creating a circle of colors in the sky that depends on where you are standing.

Let's understand it simply

Imagine you are playing cricket after rain. Suddenly, you see a beautiful rainbow in the sky. It looks like it is touching the ground far away, maybe near the village well or behind the school. But if you walk towards it, the rainbow seems to move further away. No matter how fast you run or cycle, you never get closer. This is because a rainbow is not a thing you can touch. It is just light bending and spreading in the air, and it only appears when you look at it from a certain angle.

How it works

1. Sunlight shines on raindrops in the air after rain.
2. The light enters a raindrop and bends (this is called refraction).
3. Inside the drop, the light bounces off the back (reflection).
4. The light bends again as it leaves the drop.
5. This bending spreads the light into different colors, making a rainbow.
6. You see the rainbow only if you are standing at the right spot, with the sun behind you.

The story behind it

People have wondered about rainbows for thousands of years. The first scientific explanation was given by Isaac Newton in the 1600s. He showed that white light is made of many colors and explained how raindrops split the light. Newton used a glass prism in his lab to show the same effect as a raindrop.

Where you see it in real life

• After a monsoon rain, when the sun comes out and there are still raindrops in the air.
• When you spray water from a pipe or hose in your garden on a sunny day.
• Near waterfalls, where tiny water droplets float in the air and sunlight passes through.
• Sometimes, you can see a rainbow in the mist from a pressure cooker if sunlight is coming through the window.
• In the spray behind a moving bus or truck on a wet road, if the sun is shining.

Why it matters

• Rainbows help us understand how light works and how colors are formed.
• The science of rainbows is used in making lenses, glasses, and even in CDs and DVDs.
• It teaches us about refraction and reflection, which are important in physics and optics.
• Knowing about rainbows helps in weather prediction and understanding the atmosphere.

Common mistakes

• Thinking a rainbow is a real object you can touch. It is only an image made by light.
• Believing there is treasure or a pot of gold at the end of the rainbow. This is just a story, not science.
• Thinking everyone sees the same rainbow. Each person sees their own rainbow, depending on their position.

Remember it

A rainbow is made by light, not matter—you can see it, but never touch it.