According to the materials that many witnesses provided, we can proximately
know the shape of ball lightening. This luminous sphere is larger than
a golf ball but smaller than a football. It can be white, green, yellow and
orange, and it can be as bright as a 100-watt bulb.
Ball lightening lasts for 5 to 10 seconds. It freely floats near the ground
as the waves of air. Sometimes it goes against wind, passes through door and
windows into the room or even stoves and chimneys. It hangs in the air now
and then or just disappear quietly as well, while it can also explode
with a huge sound and vanish when it hits any obstacles.
The speed of ball lightening is relatively slow. Sometimes
it moves no more quickly than people who are running. In very
rare cases, it makes a sound like a slight whistle, a sizzle
or a hiss. But all hits of ball lightening have something in
common; ball lightening nearly always happen during thunderstorms.
Ball lightening is mysterious, which is actually because of
its rarity. People are very fascinated by its dimly discernible
whereabouts, variable colors and huge destructive power in a
sudden. As early as the time of ancient Greece, people had
started to notice these fancy natural phenomena. Ball lightening
is one of them that people still can not explain. Many witnesses
think that the movement of lightening is like something with
wisdom. It seems to know where it is going; if it enters a room,
it usually goes through the door or window and then comes to the
corridor. Of course that is just out of people’s imagination.
Ball lightning is highly destructive. It can not only break windows
but also peel off the outermost layer of the wall, causing severe death of human
and animals. However, there is not enough evidence for people to figure out
what the real reason is.
What is slightly different from lightning is that ball lightning
has not been proved to be able to make damage to trees. Ball lightning
can hardly be destroyed. Someone once shot it with a rifle,
while nothing happened after that.
Because of the low frequency of occurrence of ball lightning,
it is difficult for scientists to make systematic observation.
So far no one has taken any photos of high quality for scientific researches.
Theoretically, someone thinks that ball lightening is a lump of hot
air or gasified elements such as C, Na or Cu. Although this theory
explains some features of ball lightening, it doesn’t tell why ball
lightening can take shape in airplane cabins.
Besides, there are also many various statements concerning ball
lightening as plasma, ions, charged dust particles, water with
outer electronic shell and so on. However, no theory can perfectly
explains this scientific mystery. If you meet ball lightening when
raining or just happen to take photos of it, be sure to take down
everything, which will be fully precious research materials.