Fact of the day #4
Why is the sky blue? Very big question.
The dispersion of the solar rays, commonly known as Rayleigh scattering, explains that the light that enters in the atmosphere collides with all the molecules (mostly nitrogen and oxigen) and rebounds like a pinball. If all the solar rays sacttered evenly, we would see the sky white. But blue light scatters easier than the red or yellow ones, thats because the blue light has less wavelength. Thats because we see the sky blue.
Bonus: the clouds are white for the same reason, alike the air, water molecules disperse all type of wavelength equally, so we see all the colors at the same time (we do not distinguish each of the colors individually since they all arrive simultaneously combined from the same poin), which makes white. When the clouds are color grey, its because the clouds have more water density, so they let pass through less light.
