Why is the sky blue?



Why is the sky blue?


When it comes to the color of the sky, the first thing that comes to mind is blue, although its color has changed with different times of the day, so we see its color ranging from dark indigo to red or orange at times when the sun sets, and given the sun is a source of light It is on the ground, and the light it emits is white. If we think the sky is blue, it really raises wonder and wonder


It is known that white color results from a mixture of the seven spectrum colors that appear in the rainbow (red, orange, yellow, green, indigo blue, and violet), which is caused by the difference in the lengths of the rays that make up the light. As for the visible material, its color is produced by sunlight. Of different lengths.

Moreover, some materials are distinguished by their ability to reflect light, absorb it or make it refract in different directions . (Except for a completely transparent material that will allow light to pass through as is)
And for further clarification, for example, red material, when exposed to light, absorbs all colors of the spectrum except for the red color, which you reflect. The purple material reflects some red and some blue. As for the white matter, it reflects all the colors of the spectrum, and black absorbs them all
And when the passage of the light beam through the air , it is exposed to the refraction of a certain degree so that degree depends on the amount of dust located around it . The blue waves (short waves of the color of the spectrum) are much more refracted than the wavelengths of red (red). On clear days when water drops and dust are less, the reflection of the light rays is very limited, and as a result we see the sky with their light blue color.
As for sunset times , the amount of dust in the atmosphere increases, especially during harvest days, which leads to an increase in the dispersion of light, especially the short blue waves , so that the rays appearing on the surface of the earth are red and orange.
It should be mentioned that if the Earth were like a moon without an atmosphere surrounding it, the sky would have seemed black all the time, at night and during the day.

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