The Sky Is Actually Violet, but We See It as Blue

Sun is the only source of light for us. The Sun creates heat and light which travel to Earth and to other planets around it with the process of fission. The Sun deliver white light to us. This white light contains all the primary colors. Light travels in space as waves. Every color of the white light has its own wavelength. Violet and blue have short wavelength. The red color has the longest wavelength. All other colors are somewhere in between.

Small particles and molecules which fly in the Earth atmosphere have the starring role in sky coloring. When light passes through the atmosphere, most of it collides with molecules and is reflected back in space. This is very important, since if all light passed through the atmosphere, then the life on Earth would be impossible.

So, the light is constantly being reflected from the dust particles and water molecules. These particles and molecules reflect only the violet and blue colors of the light spectrum. They absorb the others.

The violet color is more often reflected first compared to blue. However, our eyes are more sensitive to blue color and that’s why we see the sky as blue.

On the other hand, red color passes through atmosphere. The red wavelength are used by plants in the process of photosynthesis.