Which force in nature is believed to have formed second?

In physics, there are four fundamental forces of nature – Gravitational, Electromagnetic, Weak Nuclear, and Strong Nuclear Force. All four fundamental forces have been interacting since the beginning of time. To answer your question “All forces formed at the same time “.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.