These two questions are so trivial that seem to have been made by a child. But would you know respond?
The solution lies in the electromagnetic nature of the sunlight.
Visible light is in fact made up of many electromagnetic radiation of different wavelength which together form what we perceive as white.
Each wavelength of light is perceived by a different color.
When a ray of sun reaches the earth meets the atmosphere composed of nitrogen, oxygen, and suspended as steam, water and other particles.
If the light encounters a drop of water, is fully reflected in all directions (colored with white clouds and fog) when he meets while nitrogen and oxygen status gas behaves differently depending on the wavelength of each color: red, which has a longer wavelength, will continue its road, as well as yellow and orange, while blue, which uha less Onga length, will be distributed in all directions and color the sky.
If the light encounters a drop of water, is fully reflected in all directions (colored with white clouds and fog) when he meets while nitrogen and oxygen status gas behaves differently depending on the wavelength of each color: red, which has a longer wavelength, will continue its road, as well as yellow and orange, while blue, which uha less Onga length, will be distributed in all directions and color the sky.
The sky near the horizon is blue because light must pass through more atmosphere and is therefore more widespread.
When approaching the sunset, the sun lowers on the horizon and the light blue and loses further component is disseminated other radiation such as red, which colors the sky.
If there were no atmosphere, the sky would be black (as on the Moon) and the sun would appear white. The indefatigable
Sun is yellow on the same principle: the light of the solar disk, encountering the atmosphere, has a different path depending on the wavelength and color that is popular is precisely the yellow.
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