Why is the sky blue?

Alodimary Lahoz Camacho

            Since I was child I have been very curious and I question everything around me. I always wondered how it was heaven to hop on a plane. When I traveled for first time I wanted to sit close to the window to see everything near. The sky, the Earth's atmosphere, the privilege of inhabited only planet known. No matter where on Earth we are, we all share the same sky. Have you ever wondered why the sky is blue? The same question I did when I was mounted on that plane. May seem to be a simple question, but it touches actually some of the deepest aspects of astronomy and sky gazing. To answer this question and understand we must raise our head to the clouds.

            I was determined to understand why the sky is blue and I looked for information by reading and research to share with you. People said that planet Earth is blue for the color of their oceans, but in reality the atmosphere and its composition have much to do with the color and not the seas as people say. The beauty of heaven is not merely the result of moisture from the atmosphere to the composition of sunlight consists of the different colors of the rainbow. An amount of moisture, relatively small, accompanied by dust and ash is sufficient to cause the multiple manifestations of sky color. Interesting, isn't?

            To explain the blue sky, we imagine that we let a ray of sunlight through a prism of glass. The light is scattered as a result we see different colors in the refraction of light rays caused by the gases in the atmosphere. Sunlight is composed of different wavelengths with different colors: red, yellow, orange, green, blue, violet.

            In heaven we can not see them there are many gas molecules and tiny particles. When sunlight hits these particles are dispersed in different directions. Now, we look that the blue and violet are much more energetic than red and yellow. Because the violet ray is that it has spread over the direction of the ray and that is precisely the explanation that we seek. Because the deviation is maximum for rays of short wavelength like violet and blue, and lowest for long-wavelength such as yellow and red, which are hardly deflected. So, blue rays, once diverted, are bumping with other airborne particles to reach us. That's why our eyes when they appear to come from all parts of the sky. The yellow rays do not appear nearly diverted and this is why the sun appears to us that color

            We have to know that in honor of the physicist Lord Rayleigh who is known for his investigations of wave phenomena. Rayleigh scattering, is the scattering of light by particles smaller than the wavelength dispersed. This occurs when light travels through transparent solids and liquids, but is seen most often in the gases. So the Rayleigh scattering of sunlight in the atmosphere is the main reason that the sky is blue.

            Finally, the secret of blue sky is that before reaching to us, the light rays have to pass through the atmosphere and on the road, hit the dust particles, water droplets, gases and other so during the day, the gas particles scatter blue light from the sun, making the whole sky appears blue, a beautiful blue.