Today, I was just surfing around the web and found “Sonic Boom”!
What is it?
It’s when the aircraft goes faster than the speed of sound and creates water vapors basically or according to Wikipedia:
When an object passes through the air, it creates a series of pressure waves in front of it and behind it, similar to the bow and stern waves created by a boat. These waves travel at the speed of sound, and as the speed of the object increases, the waves are forced together, or compressed, because they cannot “get out of the way” of each other, eventually merging into a single shock wave at the speed of sound. This critical speed is known as Mach 1 and is approximately 1,225 kilometers per hour (761 mph) at sea level at room temperature.
Video of how it works: