Állítólag ez, de én nem értek hozzá.
shadewing
6h
The photo was taken from the ground by Camden Thrasher during AirVenture Oshkosh air show in 2021 in Viskonsin.
What you see here is a plane moving at approximately Mach 0.9 (transonic flight) and supersonic expansion fan forming around aerodynamic surfaces of the plane where airflow is faster than speed of sound.