Why is the sky blue - Here is the reason

Blue Sky Scattering

Why is the sky blue? 

The blue color of the sky is due to a phenomenon called Rayleigh scattering. When sunlight enters the Earth's atmosphere, it collides with molecules of air, such as nitrogen and oxygen. The sunlight consists of different colors of light, each with a different wavelength. Blue light has a shorter wavelength than other colors, and when it collides with the air molecules, it gets scattered in all directions.

As a result, the blue light becomes dispersed throughout the atmosphere, making the sky appear blue to our eyes. The other colors of light, such as red and yellow, have longer wavelengths and are less affected by scattering, which is why we see the sun appear yellow or orange during sunrise or sunset when the light has to travel through more of the atmosphere.

This scattering phenomenon also explains why the sky appears reddish or orange during sunrise or sunset, when the light has to travel through more of the atmosphere and encounters more molecules, resulting in more scattering of the longer wavelength colors.