Whether it is the sky looks blue, Why sunset looks red? First I'll explain the reason the sky looks blue.
Why is the sky blue?
In the nature of color, but I was called the sun contains the color of the different wavelengths, blue is more its wavelength is shorter. Because the flying dirt and dust in the air, short blue is easy to hit the wavelength, the light will Defeat around. Conversely, long red wavelength can be passing through the dust and dirt. Therefore, since the littered If you look at the sky blue light from a distance, you will see blue sky. It is what the figure below has been described it.
SunsetA-Why is the sunset red?
2015 身の回りの光と色の現象