Why is ball lightning colorful? It suddenly explodes and then disappears quietly.

"Spherical lightning, commonly known as rolling thunder. This is a real physical phenomenon, which usually occurs in thunderstorm weather. It is very bright, with a diameter of about 15 to 40 cm. " Ou Bo, a meteorologist of video technology, told the Science and Technology Daily reporter that ball lightning usually lasts only a few seconds, but it also lasts 1 to 2 minutes. In addition to the common orange and red, there are auras of various colors such as yellow, purple, blue, bright white and dark green.

Lu Taowei, deputy director of the State Key Laboratory of Disaster Weather of China Academy of Meteorological Sciences, also said that spherical lightning is a very rare physical phenomenon in nature. Compared with cloud lightning and cloud lightning, spherical lightning is very rare, so it is difficult to observe. Most of the records of spherical lightning are eyewitness statements. Spherical lightning usually appears with cloud lightning in thunderstorm weather, sometimes it is static, but most of it moves horizontally. It will suddenly explode and disappear quietly, and some will be accompanied by peculiar smell and burning smell.

The first theory holds that spherical lightning is composed of small water droplets containing hydrated ions, which release energy through ion reaction. In this theory, spherical lightning is an electrochemical structure containing plasma, which is maintained by the delicate balance of temperature, pressure, electromagnetic field and gravity field.

The second theory holds that ball lightning is made of polymer filaments and releases energy through surface discharge. In this theory, natural particles in dust, such as particles from cellulose, soot or silica, can form a filamentous structure, and these filaments gather into a highly charged sphere, which will emit light and heat when its surface is discharged; The third theory holds that spherical lightning is composed of metal nanoparticle chains, and its energy release is carried out through surface oxidation of metal nanoparticles. In this theory, ordinary lightning can cause substances such as soil or wood to release metal vapor, and this charged metal vapor is concentrated into a grid of metal nanoparticles.