Why the Sky is Blue

It is the science that today you know the world, different places, different discoveries, etc. and one of them is the colour science. This colour science explains about the colour. Suppose something looks yellow, then what is the reason behind? It seems so simple today but was a mystery some decades ago. Similarly, there is a science behind the sky and its colour. It’s not only the sky, but oceans also look blue because of the same reason. The earth itself is a blue planet.

History of Blue Colour

It was 1859 when John Tyndall discovered, why the sky looks blue on earth? But there is a history behind the discovery of the colour blue. The pyramid was a sign of Egyptians and some artist also made small pyramids of glass. As a result, they saw the sun rays entering the small pyramids and it further scattered. They noticed a blue colour because it scattered the most. This was the first time when people noticed a blue colour.

What is the Real Colour of Our Sky

There are many layers in our atmosphere and some water droplets are also present all over. When the sun rays enter our atmosphere, it gets refracted and scatters. It is similar to the glass pyramid case and the blue colours scatter the most and make the sky look blue. Basically, it is a white light which contains all the seven colours.

Light travels in the form of wave and different colours have a different wavelength. Blue has a short wavelength which results in scattering more. For example, you can see the red signal from far, or you might have seen many sign boards written in red colour. This is because red penetrates the least as a result it remains the same from far.

How does the Sky Look from Space

So, we can say that the sky is colourless and it seems blue just because of the atmosphere we have. All thanks to our atmosphere which makes our world look so beautiful. When astronauts go into space, everything seems black, just because of the absence of the atmosphere. Atmosphere plays a very important role on our planet but no one really cares.

We should take care of our planet and should work on pollution controlling methods. Otherwise, the depletion of the ozone layer can trouble us. Nowadays due to some harmful gases, our atmosphere is getting less humid. Which results in lower penetration of light and as a result the sky does not look as blue as it should be. Thanks to COVID-19 that made our environment clean and the original sky-blue colour visible to us.

How ‘John Tyndall’ Discovered the Blue Colour of the Sky

John was a scientist and use to perform several experiments. Once he used two test tubes and hold them in such a way that the sun rays passed from one to another. In this way, he saw that the tube appeared blue from one end, whereas it appeared red from the other side. This made him clear about the blue colour of our sky.

I can say that colours play a very important role in our life and we have made certain perceptions about various colours. Another thing I would like to mention is science. Really our science and technology had made our lives easy and simple. When we get a correct explanation about something, things seem clearer. If it would not be discovered at that time many other experiments would not be performed. Actually, science is all about progress and it never stops. That's why the blue colour of the sky on earth has been resolved.