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Whenever there is a storm.
Before coming, there will always be lightning and thunder in the sky. These lightning and thunder are not uncommon for us from childhood to adulthood. So, we all know that lightning disappears after rain and thunder, but are all these lightning gone?
Let's explain to you, after the thunder, the lightning will go **. We all know that on urban buildings, high-rise buildings.
There is a lightning rod.
Target. The function of these lightning rods is to be able to correctly guide lightning and lightning into the ground, reduce the behavior of discharging on the ground, so that pedestrians on the road and pedestrians in the house are safe, so as to maximize the protection of our lives and life safety. <>
Then after the rain, most of the lightning that thunders in the sky in the form of air ions ionization, the ionization released in the air will be consumed with the drive of the air, or be dissolved, so we often see a phenomenon, that is, in the moment of thunder and lightning, the lightning will faintly disappear, this time is the ionization reaction of electrons. It is because of this ionization of electrons that even if we see beautiful lightning, it disappears in an instant. <>
Then there is also a part that will be absorbed by the lightning rod placed on the high-rise building, and the electricity will be discharged at the tip of the lightning rod.
Then, through the conduction of lightning rods, it enters the wall of the building and thus leads to the ground. So why don't we feel it? Because when the current is introduced, it only exists for a moment, and in this moment, our people will not feel it.
Even if you put your hand on the wall, you won't feel anything. This is the purpose of installing lightning rods, which is to avoid unnecessary harm to everyone's life safety. <>
So now everyone should know that after the rain and thunder, the lightning disappears, and the electricity goes to **. In fact, rain and thunder and lightning are not terrible, as long as we take protective measures, for us, thunder and lightning have nothing to do with us.
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Dissipated in the air, lightning is composed of electrons in the air, these electrons can not polymerize for a long time without a medium, and will dissipate in the air after thunder.
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Some of the electricity was consumed by thunder and lightning, and some of it was carried away by clouds that did not turn into rain.
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It should have become free electrons and dissipated in the air, and we can't see these electrons.
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Thunder and lightning will occur on rainy days because when the air is extremely unstable, it is prone to strong upward convective movement, and the formation of towering cumulonimbus clouds, the clouds are filled with water vapor rushing up and down, which will produce static electricity, and the upper and lower ends of the cloud will produce electric charges, and the air will expand in an instant** to produce thunder, and the electric sparks emitted are lightning.
When it rains, some of the clouds in the sky are positive and some are negative. When two clouds collide, lightning strikes, and at the same time emits a lot of heat, heating and expanding the surrounding air. The air that is heated and expanded in an instant will push the surrounding air, causing a strong **-type vibration, which is thunder.
Thunder and lightning are the phenomenon of electrical discharge in thunderstorm clouds. The formation of thunderstorm clouds generally requires two conditions, sufficient water vapor and violent convective movements.
Lightning is a phenomenon of intense electrical discharge between clouds, between clouds and the ground, or between parts of the cloud. Usually storm clouds (cumulonimbus clouds) produce electric charges, with yin electricity at the bottom and yang electricity at the top, and also a positive charge on the ground, which follows the clouds like a shadow. Positive and negative charges attract each other, and the positive charges run towards trees, hills, the tops of tall buildings, and even above the human body, reaching down and getting closer to the ground.
Finally, the positive and negative charges finally overcame the barrier of air and connected, and a huge electric current surged along the conduction airway from the ground to the clouds, and lightning was generated.
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From the point of view of conservation of energy, in a system, energy cannot be generated or disappeared for no reason, and its total amount remains in dynamic equilibrium, which is the law of conservation of energy that we are often exposed to. As for the lightning produced by the Earth's atmosphere, we also obey this law. The reason for this confusion is that we do not have an accurate or comprehensive grasp of the concept of "system".
Let's take a look at how lightning is generated. The lightning is large in scale and involves a wide range of areas. It is also essentially the result of a charge neutralization reaction.
Its production relies on the violent convective movement of the air, so it occurs more frequently in summer than in winter. The generation of lightning must be the formation of clouds with different charges in the clouds. When the electricity in a cloud with positive and negative charges accumulates to a certain extent, it forms a potential difference large enough to break through the air in the middle, causing a violent charge neutralization reaction.
In the process of intense air convection, when the hot air rises, the water vapor carried by it will condense and crystallize into tiny ice particles, which collide with each other due to continuous convection, thus gathering into ice crystals of different volumes and weights, and those ice crystals with larger weights will be relatively densely distributed at the lower end of the cloud layer and are negatively charged; Ice crystals, which weigh less, are carried higher by the air current, dense at the upper end of the cloud, and positively charged. The more intense the air convection, the higher the water vapor content in the air, the more obvious the up-and-down distribution of different properties of cloud charge, and the greater the cumulative potential difference. When the potential difference reaches a certain level, it can break through the air in the middle layer and ionize the air molecules, thus forming a channel for the transfer of positive and negative charges, resulting in a violent charge neutralization discharge reaction, and we can see the occurrence of lightning on the ground.
During the discharge process, a large amount of light and heat energy is released at the same time, causing the surrounding air to expand violently, which in turn pushes the air to form a shock wave, and we hear thunder. Because sound travels much slower than the speed of light, we need to hear thunder after seeing lightning happen, but they actually happen at the same time. Sometimes, when the height of the cloud is low, when the charge carried by the object in near-Earth space or on the ground is opposite to the charge carried by the lower end of the cloud, reaching a certain potential difference, there will be a certain probability of breaking through the air between the cloud and the ground, resulting in a very destructive near-Earth flash.
Storm clouds create a positive charge on the ground, attracting negative charges in the clouds, which can cause lightning strikes on the ground. Because air is not a good conductor, the positive charge on the ground looks for trees, hills, tall buildings, and even the human body and tries to release upwards through these tips, shaking hands with the negative charge in the cloud.
So try not to stand on a high place during a thunderstorm, and don't stand under the eaves and trees. Only when neutralization is released will the clouds and the earth die out and live in peace. The by-product released is heat energy, which is gradually dissipated into the air through the heat conduction and convection of air molecules.
It is "dissipation", not disappearance. This dissipation is like lighting a bonfire in the wild, hanging a pot in the bonfire to boil the meat, consuming part of the energy, and most of the remaining energy dissipates in the air, gradually disappearing through heat convection and heat conduction. We feel the heat near the fire, becoming an object that helps to transfer the heat away.
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Lightning ends up in the air, after all, it is made up of electrons and easily dissipates in the air.
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In the summer, thunder and lightning are very common natural phenomena for us. The so-called thunder is the sound of two or more charged clouds colliding with each other, and at the same time when the sound is belated, you will see the "sparks" produced by these clouds colliding together, and there will be lightning after the thunder, and if the electricity does not hit the surface of the earth, it will slowly decrease until it disappears under the action of resistance in the air, and if it is concentrated on the surface or the ocean, it will also decrease until it disappears under the action of the corresponding resistance.
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Electricity is basically absorbed by the clouds, because the clouds are conductive, so the electricity will enter the clouds.
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The lightning must have been sucked into the interior of the earth, because after the thunder, it will connect with the underground and absorb into the interior of the earth.
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The electricity is basically diluted because it is conducted into the clouds, which can absorb electricity.
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In fact, it is introduced into the ground or disappears out of thin air, because it simply cannot remain in the air for too long.
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According to the physical phenomenon, the propagation rate of light in the air exceeds the propagation rate of sound, so it is common to see lightning first and then hear thunder on rainy days.
In detail, in fact, in the distance, thunder and lightning occur at the same time, (lightning strikes are clouds from the link of fitness movement, causing a positive charge, and the positive charge will cause a spark discharge when charging and discharging, not only with light but also with sound), and light travels 3,000,000 kilometers per second, and the sound only travels kilometers in the air for one second, and the speed of the wave is only one-ninety thousandth of the speed of light. As a result, light travels quickly, while sound is much slower, which is why people see the situation in their daily lives, "when it rains, there is often thunder and lightning, but lightning is seen first, and then thunder is heard."
1.Temperature endangers the density of the air, the high temperature, the density of the air is small, and the friction resistance obtained by the sound wave frequency in the whole process of propagation is small, so the wave speed is relatively large, so the sound does not necessarily propagate along the parallel line after being transmitted from the sound source.
2.Speed of light: The rate at which radio waves propagate in a vacuum pump. The speed of light is the highest rate at which nature objects can be exercised.
3.100 million light-years: Length unit conversion, taking into account the spacing between stars.
4.Occurrence of lightning:
Flames occur because of the separation of positive and negative charges between this and that cloud in a cumulonimbus cloud and between the cloud and the road surface.
Small raindrops, hailstones, and small snowflakes during the landing process will cause the separation of positive charges, like rubbing a balloon on a cashmere sweater. Rainfall caused by fitness exercises in the clouds also causes some of the clouds to be negatively charged cores and another part to be positively charged.
When the difference between positive and negative charges is too large for the gas to be blocked, a charge-discharge situation will occur, and a fire will occur, that is, lightning. When lightning is generated, the temperature of the gas in the lightning area may reach 27,760°C, which is also twice the temperature of the sun's surface. The high-temperature vapor rapidly expands into the air outside the lightning province, resulting in a very large sound wave frequency at the edge of the lightning, that is, lightning travels at the speed of light, reaching 299338 kilometers per second; Thunder travels at a speed of only 317 meters per second, so everyone will see lightning first.
In a heavy rainstorm, if you want to know how far away from lightning is, count them from the moment of lightning until you hear thunder. Pay attention to the way of counting with 1-1000, 2-1000, 3-1000, and each count indicates that the lightning is outside. In other words, if you count to 3-1000 whole parts, then the distance of lightning is 3 times that of a kilometer, that is, about 1 kilometer away.
If there is almost no gap between lightning and thunder, then the lightning is getting closer and closer, and there is a good chance that you will be in trouble.
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When it rains, you see lightning and then hear thunder because light travels faster than sound, so you see lightning first and then hear thunder.
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Because it is a natural phenomenon, and it is also scientifically based, and lightning is faster than thunder, so this phenomenon occurs.
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Because the speed of light is faster than the speed of sound, when it rains, lightning is seen and then thunder is heard.
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1. The formation of thunder, a cloud with a negative electrode and a cloud with a positive electrode, contact together will produce sparks, in the process of generation, there will be a large number of electrons moving and colliding, it will make a sound, and thunder will be formed.
2. The generation of lightning, when the sky produces lightning, there will be a lot of clouds around, those clouds are electrified, some socks are positive, some are negative, when the positive and negative electrodes are in contact together, sparks will be generated. Because the voltage of the ground is 0, in other words, the ground is a conductor without voltage, at this time, those electrified clouds in the ground and the sky form a conductor, and if you move along the conductor, the electricity will move to the ground, and lightning will be formed.
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1. The formation of thunder, a cloud with a negative electrode and a cloud with a positive electrode, contact together will produce sparks, in the process of generation, there will be a large number of electrons moving and colliding, and the sound will be made when the slip is called, and thunder will be formed.
2. The generation of land vertical lightning, when the sky produces lightning and wax, there will be a lot of clouds around, those clouds are charged, some are positive, some are negative, when the positive and negative electrodes are in contact together, sparks will be generated. Because the voltage of the ground is 0, in other words, the ground is a conductor without voltage, at this time, those charged clouds in the ground and the sky form a conductor, and if you move along the conductor, the electricity will move to the ground, and lightning will be formed.
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It is a sign of a thunderstorm.
When thundershowers come, there are often strong winds and thunderstorms. Persistent and intense thunderstorms can often reach the level of torrential rain. The other signs are as follows:
1. Sunny: The sky is less than 3 percent cloudy.
2. Cloudy: The sky is cloudy with 9 percent or more.
3. Fog: A large number of tiny water droplets or ice crystals float in the air near the ground, and the horizontal visibility drops to less than 1 km, affecting transportation.
4. Light rain: the daily precipitation is less than 10 mm.
5. Heavy rain: daily precipitation in millimeters.
Impact on agricultural production
First, thunderstorms mostly occur in summer, and summer is the time when crops need rain the most, so thunderstorms are beneficial to the cultivation of crops.
Second, thunderstorms are beneficial to agriculture because of the phenomenon of lightning, which is conducive to the dissociation of nitrogen in the air and can increase the fertility of the soil as the rain falls.
Thirdly, thunderstorms are relatively short, especially hot thunderstorms, but they are very urgent, and in valleys or river valleys, flash floods often occur and destroy crops due to lack of drainage for a while, so we must take precautions [2].
Fourth, because thunderstorms come in a hurry, the rain drops are heavy, so the soil is often washed away. Soil is the most important cost of our agricultural production, so we need to prevent soil erosion.
The above content reference: Encyclopedia - Weather Forecast.
The above content reference: Encyclopedia - Thundershowers.
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