The harm of lightning

More than two-thirds of lightning victims were attacked outdoors. Two thirds of the people survived. Among the people killed by lightning, 85% are women, and most of them are between 10 and 35 years old. Most of the dead hid from lightning and rain under trees.

Sullivan may be the champion who was struck by lightning. He is a retired forest manager who was struck by lightning seven times. Lightning once scorched his eyebrows, his hair, his shoulders, ripped off his shoes and even threw him out of the car. He said simply, "Lightning will always find me."

The harm of lightning to human body includes the direct action of current, overpressure or electric power and high temperature. When a person is struck by lightning, the current will pass through the human body quickly. In severe cases, it will lead to heartbeat, respiratory arrest and brain tissue hypoxia and death. In addition, when lightning strikes, sparks will be generated, which will also cause different degrees of skin burns. Lightning injury can also cause dendritic lightning stripes, epidermal peeling, intradermal bleeding, eardrum or visceral rupture.

China is a country prone to natural disasters, which is closely related to its geographical location. There are also many lightning disasters in China, the most serious being in the south of Guangdong Province. The lightning natural disasters in Dongguan, Shenzhen and Huizhou have reached the highest in the world, and these places are also affected by the relatively low atmospheric position. New york is the area with the most lightning disasters, which has been obviously strengthened in recent years, especially in Dongguan, China. Economic Losses Caused by Lightning During May-August in summer, the GDP loss in Dongguan is close to 6%, and the economic loss is tens of millions. It is also a serious natural disaster-prone area. There are many lightning injuries in Dongguan every year, reaching the highest and most frequent level in the world. In China, even in the world, it is one of the hardest hit areas by lightning.

Special Effects of Lightning on Biopathological Cells

As we all know, lightning comes from the cumulonimbus layer in summer. When the clouds carrying charges are close to the high-rise buildings on the ground, the collision of positive and negative charges will occur, forming a powerful flash, and at the same time, a huge roar will be generated, accompanied by the vibration of the air. This is lightning. Sometimes people call lightning lightning. Why is it called lightning Because "thunder" symbolizes explosion, and "thunder" in "thunder and lightning" describes sound, and "lightning" is the light radiation formed by the collision of positive and negative charges, so people call lightning in nature thunder and lightning. The voltage of lightning is very high, about 65.438+0 billion to 65.438+0 billion volts. The power released by a medium-intensity lightning can be as high as 6.5438+million watts, which is equivalent to the output power of a small nuclear power plant. Lightning rod can only prevent the strong charge impact of direct lightning, and it is difficult to play a role in the electromagnetic induction of strong lightning. Lightning is divided into contact charge and induced charge.

(1) Contact charge: In the strong cumulonimbus layer, due to the continuous accumulation of charges, a strong electrostatic high-voltage electric field is formed. Under the action of electric field force, tip discharge is formed on high objects on the ground, and the charge is unloaded. In this case, the cloud is positively charged and the earth is negatively charged. When positive and negative charges collide with each other, they will form an instantaneous neutralization reaction, also called direct lightning.

(2) Induced charge: At the moment of cloud discharge, a strong electromagnetic conversion is formed, and this strong electromagnetic field will form an induced charge on the metal conductor on the surface of the earth. This induced charge will accumulate in an instant to form a high-voltage electric field discharge, which will destroy the communication network and electrical equipment in an instant.

Lightning will do great harm to human life, and the annual thunderstorm season will cause hundreds of millions of dollars in direct economic losses to human beings. The number of people and other animals killed by lightning every year is amazing, and this number is still rising. Lightning damage to human body mainly includes two types:

(1) Direct lightning strike: At the moment when a person is struck by lightning, a powerful current will quickly pass through the human body. In severe cases, it can lead to cardiac arrest, lung failure and brain tissue hypoxia and death. In addition, the high-temperature arc generated by lightning strike will also form skin burns and carbonization in different degrees. When the human body is injured by lightning, it will form dendritic lightning strike texture, which will cause skin peeling and bleeding, and also cause eardrums and internal organs to rupture. In addition, according to incomplete statistics, the number of lightning strikes worldwide is as high as 1700 in thunderstorm season every year, and thousands of people around the world are struck by lightning every year. On relatively flat terrain, buildings about 30 meters high will be hit once a year on average; Every high-rise building with tens of meters or even higher, such as radio or TV tower, will be struck by lightning for about 20 times every year, and the high voltage generated by each lightning strike will reach about 600 million volts. Without lightning protection, these buildings would have been destroyed long ago. Lightning strikes from clouds to the ground also include the number of occurrences within an interval of about 50 milliseconds, that is, about 4 independent lightning strikes. The peak current of the first lightning stroke is about 20000 amps, and the peak current of the subsequent lightning stroke will be halved. The last lightning strike is likely to produce a continuous current of about 1.40 amps, which can last for tens of milliseconds.

(2) Lightning induction. It is a powerful instantaneous electromagnetic field generated in the process of lightning induction, which can generate induced charges in the ground metal mesh. Including wired and wireless communication networks, power transmission networks and other wire systems made of metal materials. The high-intensity induced charge will form a strong instantaneous high-voltage electric field in these metal nets, thus forming a high-voltage arc discharge for electrical equipment, which will eventually lead to the combustion of electrical equipment. In particular, the damage to electronic and other weak current equipment is the most serious, such as TV sets, computers, communication equipment, office equipment and so on. Every year, more than10 million electrical equipment accidents are destroyed by induction lightning. This kind of high-voltage induced electricity can also cause harm to people.

In China in the 1980s, due to the popularity of TV, the height of TV antennas was mostly around10m, and some were less than10m. This kind of antenna height is common in plain areas, and there are many tall objects around it, mainly including trees, high-rise buildings, water towers, commercial power grids and so on. In view of the height of civil TV antenna, its probability of being hit by direct lightning is very low.

An accidental strong lightning let people know the instantaneous strong magnetoelectric conversion process caused by strong lightning. The height of the TV antenna at the scene of the accident is about 6 meters, which does not exceed the height of nearby buildings and trees. Tree height10m, building height 8m, cumulonimbus layer height of terrestrial TV antenna over 300m, and distance from strong lightning1000m. The TV antenna and TV power plug entering the room have been unplugged, the antenna connector is about 20 cm away from the TV terminal, the length of the feeder of the TV antenna is no more than 20 meters, and the antenna receiver is a common simple civil vibrator antenna. After a flash, a huge thunder exploded from the altitude of 1000 meters. At this time, there was only a bang behind the TV, and an electric arc flashed. Close up, the TV antenna and the terminal of the TV were burnt out by high voltage arc. At that time, everyone in the room was shocked by the sudden discharge, and they were glad to stay away from the TV, otherwise the consequences would be unimaginable. Ten thousand volts of high-voltage static electricity can break through the dry air medium of 1cm. According to the distance of 20 cm from the antenna connector to the TV terminal, it needs a high voltage of 200 thousand volts to break down. Because it was a thunderstorm at that time, the indoor air humidity was relatively high, and the voltage of the air medium that broke down 1 cm should be around 5000 volts. Even so, the voltage that breaks through 20 cm of air medium should be around 1 mv. The above data is only a rough calculation, and how high the magnetic induced charge can be generated on a 20-meter-long metal conductor needs further study.

This paper introduces many unfavorable factors of lightning to human beings. Let's talk about the benefits of lightning first. In society, we often hear news that some patients are sentenced to death by hospitals, or that some patients are identified by hospitals as suffering from diseases that can never be cured. However, after a strong lightning, the disease suddenly got better, and the blind and deaf people also recovered their sight and hearing. It's not really a secret. Human sensory organs transmit information through the nervous system. Some people are blind and deaf due to certain pathological conditions. It is very likely that the original nerve or sensory organ will return to normal function due to the excitation of strong magnetic field or strong electric field in the process of instantaneous powerful electromagnetic-magnetoelectric conversion. As we all know, human cells are composed of chemical macromolecules, and cell membrane is the smallest unit of human bioelectric field. The focus of human body is probably formed by the abnormal potential changes of cells. Under the strong electric field or strong magnetic field with appropriate frequency and wavelength, the abnormal potential of cells will be transformed into normal potential, which will restore the focus of human body. In modern medical treatment, doctors often use electrotherapy to stimulate human lesions and make the human body recover gradually.

In a word, things are not static. Lightning is a powerful electric pulse wave, and it will also form a powerful pulsed magnetic field. Strong lightning is a double-edged sword, which can bring disaster and good news to mankind. The human body is the conductor of electricity, and the strong magnetic field will generate instantaneous induced current in the human body, circulating all meridians of the human body; The human body is also an electromagnetic source, and various external electromagnetic fields with different intensity, frequency and wavelength will have an impact on the human body. Appropriate strong electromagnetic pulse radiation will promote the excitation and transformation of human lesions, and also make the human body produce special functions, which is modern philosophy. Strong static magnetic field will promote the enhancement of human brain waves, thus forming different associative thinking of the subconscious mind and changing the original physical function. The dreamy feeling caused by the influence of magnetic field can change people's subconscious thinking state, change their daily strong sense of suggestion and instruction, make people have wrong behavior and even embark on the road of crime.