Smoke ring. This is a toroidal (doughnut-shaped) vortex. It is caused by friction between moving air and the stationary air around it | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lawry, Lawrence |
Bildgröße: | 4201 px × 3332 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |