LoginRegister
This content has been restricted to logged in users only. Please login to view this content.
Tuesday, November 5, 2024
Explained Simply For Kids & Teens

Want to write for us? Click Here


Why is Our Sky Blue?

Written by Harman Dhingra, a grade 2 student (originally published in May 2020)

Have you ever wondered why the sky is blue? Here is the reason…

By I Kid You Not , in Astronomy Did You Know Facts to Know Science , at May 30, 2020 Tags: , , ,

Written by Harman Dhingra, a grade 2 student (this is an archived piece , was originally published in May 2020)

Have you ever wondered why the sky is blue? Here is the reason…

Why is the sky blue?

To know this, you first need to know something about a prism – what it is and the way it works.

A prism

A prism is a special crystal that breaks white light into seven different colours.

This is what happens when the Sun’s white light passes through the atmosphere of the Earth – it bounces on the water and gas molecules that behave like a prism.

When the light passes through these molecules it gets scattered into seven different colours.

This scattering is called Rayleighs scattering. Though there are millions of colours, our eyes can see only some.

Each colour has its own wavelength, the shortest one being blue, and the longest one being red. Due to this short wavelength, the blue colour scatters the most, while other colour lights don’t scatter as much.

This is why, when the sun is above you, light travels a shorter distance through the atmosphere to reach the ground, and since blue light is scattered all around, we see the sky as blue.

Now we need to know in the evening why the sky is red.

In the evening when the Sun is going to set, its white light has to travel a longer distance through the atmosphere. In this travel, the blue light scatters and does not reach the Earth. However, the red, orange and yellow lights that have longer wavelengths, reach the Earth. So the sunset looks beautiful scarlet coloured.  

Do you think all planets have blue skies?

No, all planets do not have blue skies. Some of them have brown skies, like Mars. However, Uranus and Neptune have blue skies, but it is a different shades of blue. The colour of the sky depends upon the gases that the atmosphere is made up of. Scientists have also discovered that some exoplanets have blue skies.

Also Read: Fun Facts about Solar Systems


This image has an empty alt attribute; its file name is Newsletter-5.jpg

Better Your Child’s G.K. In 3 Minutes – Get This Free Newsletter
Get fun facts, simple and easy news, quizzes, and lots of other interesting things to read in your mailbox – for free! It’s what we call GK-on-the-go!

I Kid You Not now has a large readership across India and also parts of the world. If you want to write for us, you can submit your story here. You can also apply to become a news anchor. Apply here

Comments


Leave a Reply