After asking yourself a number of questions, you've always wondered why the sky appears blue during the day and not black, yellow, orange or any other color you know of.
In this article, you will get to learn how the colour of the sky appears blue and not the other colors.
This starts with the sun; light from the sun appears white but actually, there are so many light rays with different colors emerging from the sun (as seen in the rainbow) but only the white rays are dominant.
According to physics.org, as the white light from the sun travels to the Earth's atmosphere, it collides with particles of air producing different wavelengths with different colors of light being scattered by these collisions.
Among these colors of light are blue and red. The Blue light has a shorter wavelength compared to the red light which has a longer wavelength. According to Physics, the shorter wavelengths (Blue light) are scattered faster and wider than the longer wavelengths (Red light).
The sun is placed so high in the sky and as its rays pass through the atmosphere towards the Earth's surface, the blue light is scattered in all directions making the sky to appear blue - actually beautiful.
This is different at sunrise and sunset when the low sky appears red/orange. Why? Because in the morning or evening the sun is close to the horizon and its rays have to pass through many atmospheres before they reach your eyes, meaning many of the blue light rays will have been scattered leaving only the red/orange rays.
So now you know.