Why is The Sky Blue?
Has anyone ever stopped to think, why is the sky blue? I haven't, until my friend, Hannah, brought it up two years ago. I haven't stopped thinking about that question since. Why? If you read my last blog post, you would notice blue is such a color of mysteries!
Why is the sky blue?
The light from the Sun looks white. But it is really made up of all the colors of the rainbow.
A prism is a specially shaped crystal. When white light shines through a prism, the light is separated into all its colors.
If you visited The Land of the Magic Windows, you learned that the light you see is just one tiny bit of all the kinds of light energy beaming around the Universe--and around you!
Like energy passing through the ocean, light energy travels in waves, too. Some light travels in short, "choppy" waves. Other light travels in long, lazy waves. Bluelight waves are shorter than red light waves.
All light travels in a straight line unless something gets in the way to—
- reflect it (like a mirror)
- bend it (like a prism)
- or scatter it (like molecules of the gases in the atmosphere)
Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves.
This is why we see a blue sky most of the time, crazy mixed up weird right?
-C.J.S.
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