Why is the thunder sound delayed?

Because the speed of sound travels at a slower rate than without light.

Extended information: Thunder is a natural phenomenon, when it rains, some clouds in the sky have positive poles and some negative poles. 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. This 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. In winter, due to the cold and dry air and weak solar radiation, convection is not easy to form in the air, so thunder and lightning are rare.

However, sometimes thunderclouds are formed in winter when the temperature is high, and thunder and lightning are generated, and rain and snow occur. Convection is particularly strong and can also form hail, which can produce the so-called "winter thunder". Knowing these reasons, it is not surprising that "winter thunder" strikes.

Cause. It is reported that one night in the early spring of 1970, the wind roared in the middle and lower reaches of the Yangtze River in China, and it was snowing with rare goose feathers. Suddenly, the sky was filled with lightning and thunder, a rare weather phenomenon that was strange.

On the day of the Lantern Festival in Luxi area, there is also a phenomenon of heavy snow accompanied by thunder. So, why does it still thunder on a snowy day?

Lightning and thunder are common weather phenomena in summer, while snow is generally in winter, which are two completely different weather phenomena. However, as long as the weather in a certain place is suitable for both snow and thunder, these two completely different weather phenomena can occur at the same time.

In winter, when the sky is overcast and the temperature in the clouds above the sky is below freezing, the water vapor in the clouds condenses into snow. When snowflakes fall from clouds, if the air temperature near the surface layer is high, the snowflakes will melt into raindrops. Conversely, if the temperature near the ground level is low and the snowflakes cannot melt, then it will snow.

The reason why the sound of thunder is delayed, we all see lightning first, and then hear the roar of thunder, I personally think that the main reason is that the speed of light propagation is much faster than the propagation speed of sound, therefore, when we are raining, first see lightning, and then hear thunder roaring, it is a very normal phenomenon.

Why do you see lightning first and then see thunder, this question has a relevant explanation in junior high school physics, because thunder, the reason for the delay is that the sound propagation is limited by speed, and the sound of light is faster than the speed of sound, so there is a phenomenon of seeing lightning first and then hearing thunder.

The sound of thunder is delayed because light travels much faster than sound, so we all see lightning first and hear thunder later.

Because the sound of thunder is transmitted through sound waves, and lightning travels at the speed of light, we hear the sound of thunder more delayed.

Because thunder does not travel as fast as lightning, it takes a while before it can be heard.

Lightning is an electrical spark produced when the charge generated by the cloud during its motion is discharged when it is discharged, and it is both light and sound. It's just that the light and sound in thunder and lightning are more powerful than the electric sparks we see in our lives. The reason why lightning is seen first and then thunder is heard because in the air, light travels fast and reaches the ground quickly, while sound travels slowly in the air and reaches the earth after a while.

So you will hear the lightning first and then hear the thunder. In fact, lightning and thunder appear at the same time.

This is because the speed of light is much greater than the speed at which sound travels.

Lightning is often instantaneous (seconds), and the sound that comes from it often lasts for seconds. At the same time, there will be ups and downs in strength and weakness.

Because the speed of light is greater than the speed of sound, we tend to see lightning first and then hear thunder.

Lightning is a discharge phenomenon in which a strong electric field is formed between various parts of the thunderstorm cloud or between the cloud and the ground due to different charged properties. Due to the narrowness of the lightning channel, too much current passes through it, which makes the air column in the lightning channel burn white hot, and causes the surrounding air to be heated and suddenly expand, and the cloud droplets will also suddenly vaporize and expand due to the high heat, resulting in a loud sound - thunder. The thunder generated inside and between the cloud is high-altitude mine; Thunder generated in cloud-to-ground lightning is called "landing lightning".

The huge current, blazing high temperature and electromagnetic radiation and accompanying shock waves formed by the landing mine all have great destructive power, which is enough to destroy the human body and buildings. For example, at 7:20 on April 25, 1986, in Guanyin Pavilion, Shuangjing, and Low Zhuang Township in Lipu County, Hunan Province, dark clouds were overwhelming, wind and rain were combined, and lightning and thunder were ......With a strong flash, a deafening thunderbolt - a thunderbolt on the ground, affected 3 townships and 6 villages, and suddenly there was chaos, thunder, rain, wind, crying, and shouting mixed together. According to the investigation of the prefectural and county joint investigation teams, 7 people were killed and 10 people were injured by lightning strikes on the spot, including 3 seriously injured.

After the lightning strike** accident, the investigation found that the wires in the houses of residents in this area were installed messily, the wiring position was very low, and 5 of the 7 people who died were struck by lightning under the lighting lights and switches; The room is quite humid before the lightning strike, which creates the conditions for the formation of lightning accidents. Therefore, the installation of wires must meet the requirements, and when lightning, stay away from metal objects that are easy to conduct electricity, and keep the room dry is one of the important measures to prevent lightning strikes.

The damage of lightning to the human body has the direct effect of electric current and overpressure or kinetic effect, as well as the effect of high temperature. When a person is hit by lightning, the current quickly passes through the human body, which can lead to the arrest of heartbeat and breathing, and the lack of oxygen in the brain tissue and death. In addition, lightning strikes produce sparks, which can also cause different degrees of burns.

Lightning injuries can also cause dendritic lightning strikes, epidermal peeling, intracutaneous hemorrhage, and rupture of eardrums or internal organs.

In the clouds, the molecules in many clouds rub against each other, producing currents of up to tens of thousands of volts. The electric current rubs against the air, producing a sound of more than 200 decibels. Since light travels faster than sound, we see lightning first and then hear thunder.

During the thunderstorm, the volume of air expands dramatically due to the sudden increase in temperature in the flash channel, resulting in a shock wave that causes a strong thunderstorm. That's why the thunder is so loud.

Thunder and lightning are usually generated in cumulonimbus clouds with strong convection, so they are often accompanied by strong gusts of wind and heavy rain, sometimes accompanied by hail and tornadoes. The top of the cumulonimbus cloud is generally high, up to 20 km, and the upper part of the cloud often has ice crystals.

Processes such as the attachment of ice crystals, the breakage of water droplets, and air convection cause electrical charges to be generated in the clouds. The distribution of charges in the cloud is complex, and in general, the upper part of the cloud is dominated by positive charges and the lower part is dominated by negative charges.

The average current of lightning is 30,000 amps, and the maximum current can reach 300,000 amps. The voltage of lightning is high, about 100 million to 1 billion volts.

Thunder is caused by the friction of positive and negative charges between clouds and clouds in the atmosphere to produce violent discharge, produce high temperatures, make the atmosphere expand sharply, and produce a deafening loud sound, which is lightning and thunder.

When atmospheric charges are constantly accumulating in the clouds. If the amount of charge becomes strong enough, lightning will occur. When lightning crosses the sky, it can quickly warm up the air along its path.

The heated air expanded rapidly, and slammed into all directions as if it had happened. This causes a huge sound wave.

Thunder is caused by the positive and negative charges between the clouds in the atmosphere and between the clouds and the ground rubbing against each other to produce violent discharge, produce high temperatures, make the atmosphere expand sharply, and produce a deafening loud sound, which is lightning and thunder. When atmospheric charges are constantly accumulating in the clouds. If the amount of charge becomes strong enough, lightning will occur.

When lightning crosses the sky, it can quickly warm up the air along its path. The heated air expands rapidly and rushes in all directions as violently as it happens. This causes a huge sound wave.