Why is the sky blue?

Ever wondered why the sky was blue? If you have, find out here.


Hey guys, I’m back, I didn’t go anywhere, but I though it sounded a bit more dramatic. Anyway today’s question ‘why is the sky blue?’ Now this question is a very classic question that is ask by many young children and is probably not even known by most adults. Now to understand why the sky is blue, we first need to think about the light coming from the sun. Now most of us class the sun as a big ball of fire, and you’d be wrong it is actually a large compression reaction, attempting to make hydrogen into helium. I’m getting a bit off topic, but my point is that the sun doesn’t just produce red or orange light, like fire does, it in fact produces white light.

You may have seen the sun and be thinking “No when I look at the sun it looks orange, you dummy.” Yes you’re right, when you look at it, especially at sun set, it looks orange. But this is the point we will eventually lead onto, when light travels through space it contains all of the colours of ┬áthe spectrum: red, orange, yellow, green, blue, indigo and violet. You may also be thinking “Non of those look white” and the light spectrum is a question for another day.

Now just accept that all of those colours make up white light, but when the white light from the sun reaches our atmosphere, the light is scattered by the particles in the air and the blue part of the white light is what remains for us to see, thus making the sky blue. Then at sunset, the blue light is being dispersed above you and is out of your line of vision and you instead see the red and orange colours.

Thank you guys for reading and I hope you enjoyed, if you liked this post make sure you leave a like and follow for more answers. If you want me to write a post about the light spectrum and how it can be broken up, leave a comment and if you have any questions just message me in the contact page.