Why is the sky blue?
Many people have theories on why the sky is blue.
One theory is the sky is blue because it is the reflection of the oceans.
A phenomenon called Rayleigh scattering can explain it.
White sunlight is made up of seven colors.
Each of these colors have their own frequencies, wavelengths and energies.
While it moves in a straight line when going through space, it starts to split up in the atmosphere.
The colors with the longest wavelengths, lowest frequency and energy pass through unaffected.
Blue has a shorter wavelength so it gets absorbed by the gas molecules.
It scatters it in different directions so when you look at the sky, it appears to be blue.