Have you ever seen such a scene when you see 2 white lines in the sky which dissolve in a while? If yes have you ever wondered why these lines exist and what is the reason for their formation?
So there is a very interesting reason behind it.
In fact many people think that these lines are the result of the flight of some kind of rocket, but it does not happen. What happens in the sky? These white lines are called vapor trails
In fact, aviation fuel is the result of burning. When fuel burns, it produces carbon dioxide and water, which leave tiny droplets behind any aircraft.
If you look closely, you will see that there is a gap between a plane and these lines. The reason is that it takes some time for the gas to form into these droplets. And the humidity in the air depends on the thickness and length of these lines. Thin and quick dissolving line means that the humidity in the air at low altitude is low whereas thick and long lasting.
The line is a sign of moisture in the air.