Why does the sky look blue during the day and black at night?

If you look at the sky during the day, you can see that it is blue. Well, why is the sky blue? This question has been on the minds of people for a long time. But for many centuries, wise men have not been able to come up with an answer.

The answer is that there are tiny dust particles floating in the atmosphere around the earth. When light from the sun reaches the earth, it is scattered by those particles. And the wavelength of blue light is so short that it is the most diffused, according to Rayleigh's scattering formula. Due to which the sky looks blue in daylight. And at night there is no scattering due to the absence of sunlight and the sky looks black.