Why sky are blue in color?

Why sky is blue in color?

Many of the people may be wondering why sky is blue in color ?

As we see the light from the sun looks white but it  is really made up of all the colors which we can see in the rainbow.When we use a prism to shines while light through prism , we can see that the light is separated into all its color which is color of rainbow. A prism is specially shaped crystal.

Visible waves are a little shorter than the size of a bacterium. By the way in the visible light range of the electromagnetic spectrum are separate smaller ranges  that our eyes see as different colors .  You can visit The Land of the Magic Windows to learn more about the visible light.

Like energy passing through the ocean is in waves , light energy also travels in waves too.Some light travels in short “choppy” waves whereas other lights travels in long, “lazy(smooth)” waves. As we can see in the below image that blue light waves are shorter than red light waves.

All lights travels in a straight path until it meet with something on the way and usually does one of these things :-

  • reflect it (like a mirror reflects)
  • bend it (like a prism used to bend)
  • or scatter it (like molecules of the gases in the atmosphere)

When sunlight reaches the Earth’s atmosphere it is scattered or move in all the directions by all the gases and particles found in the air. Blue light is spread in all the directions by the tiny molecules of air on Earth’s atmosphere. As we see in the above image that blue light waves are shorter and smaller waves so blue is scattered more than other colors. This is the reason why the color of the sky is blue most of the time we see.

What makes a red color during sunset ?

As the sun gets lower in the sky, its light is passing through more of the atmosphere to reach you . Even more of the blue light is scattered, allowing the reds and yellows to pass straight through to your eyes.

Sometimes as we can see the whole western sky seems to glow. The sky appears red because the small particles of the dust, pollution or other particles also scatter blue light, leaving more purely red and yellow light to go through the atmosphere.

Source/Help for this post and pics:-NASA Space Place


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