If there is no day, it is completely night, what will become of society?

It can be said that society will become very chaotic, and without daylight, many animals and plants will perish, and this situation will have a negative impact on the food chain.

It will have a great impact, so that the survival of mankind will become difficult, let alone have a peaceful and stable society.

If there is no day, only night, the earth will become dead and silent, because most of the heat and light on the earth is brought by the sun, and only night means that the sun has died and no longer shines.

If there is no daylight, plants will die if they cannot photosynthesize, and they will die in the face of oxygen breathing difficulties and no food for human animals, and the surface temperature will drop to minus 240 degrees, and there will be glaciers everywhere, which is not suitable for the survival of human animals, and will also become extinct, and then there will be another dark world suitable for this environment.

First of all, if there is no sun, the air will become very humid, which is not conducive to the survival and development of living things, and plants will not photosynthesize, which will accelerate the death of plants, and it will be a completely dark society, and it is not suitable for human survival, which may cause the second human extinction.

If there is no day and only night, society will be completely chaotic, nothing can be done, and some work that requires sunlight will not be able to continue, and everything will be very chaotic.

People's life and work will be affected, there is darkness everywhere, such days are completely unimaginable, can only rely on lighting, and the body will also have many problems due to long-term lack of sun exposure.

If it is completely dark, it will be difficult for the economy to develop, and there will be no need for all kinds of physical stores and shops. Live a life of darkness every day. Life is going to be very messy.

It should also become a world full of lights, and there will be no sun and no greenery, and many people will live under the lights.

I think it's going to be a mess, it's going to be terrible, people are going to panic, it's going to be very bad.

This will make people's lives more chaotic. And people are very sleepy, which is a very serious impact on society.

We humans live on the Earth, and the Earth is a member of the solar system. And the sun is the center of the solar system, and the sun is a very huge big fireball that emits light and heat all the time. Whichever planet the sun's rays shine on, the place where the planet is illuminated is bright, we call this day, and the place that does not shine is night.

Since the Earth's axis is tilted, the length of day and night varies in different parts of the Earth. In the north and south poles of the earth, the length of day and night varies the most, divided into day and polar day, that is, 24 hours a day is day or night, in the north and south poles, there are up to half a year of polar day and polar night.

We know that the sun is very far away from the earth, so it is equivalent to being fixed relative to the earth, and when the earth rotates from west to east every day, one revolution a day, half of the earth is always facing the sun, and the other half is facing the sun. Then, the half of the earth illuminated by the sun is day, and the half with the sun on its back is night.

Due to the combination of rotational motion and orbital motion, the earth produces the alternation of day and night, the change of seasons and the five belts on the earth, because the earth's axis of rotation and the plane of the orbit of the earth are obliquely intersected into an inclination of about 66°33, therefore, in the year when the earth revolves around the sun, sometimes the northern hemisphere of the earth is inclined to the sun, and sometimes the southern hemisphere is inclined to the sun. The direct point of the sun always moves between the Tropic of Capricorn, so there is a change in the length of day and night.

So as I just said, if the rotation and revolution reach the same time, there needs to be a phenomenon that occurs, that is, tidal locking, which is actually common in the universe - such as the moon, if the earth exists long enough, then the earth will eventually be tidally locked by the sun, so now it seems that it is because the moon is gradually moving away from the earth and absorbing part of the earth's rotation, so the earth's rotation speed is further simplified and accelerated, and it is tidally locked by the sun.

All this seems very beautiful and reasonable, but the habitable area of this continent is not large, because the atmosphere can only cover the area above 30 degrees north and south latitudes, and most of this continent is a plateau above 10,000 meters above sea level, if the earth is locked by the sun tides, it will gradually become a standard spherical shape, so that the sea water and the atmosphere can return to the lower latitudes, but the mantle is a solid with a high viscosity value, so this process must be very long.

Therefore, from the above point of view, assuming that the rotation speed of the earth is gradually slowing down, and it must be gradually and slowly slowing down - otherwise due to the sudden loss of its own weight, the speed is accompanied by inertia, everything on the surface of the earth will be thrown into the air, then it can be determined that animals and plants will basically be extinct, and the direct point of the sun must stay at the equator. The air near the equator is very thin, and the intense heat does not cause the atmosphere to flow strongly. In places where there is air, the heat of the sun is very limited, if this is the case of the day hemisphere, then the night hemisphere means that there is no sunlight at all, and because the night hemisphere is too far away from the direct point of the sun, the ocean heat input and output are relatively small, and the evaporation of seawater is also less, so there is no water vapor deep inland, so there is no precipitation on the inland It is very dry.

Eventually, the oceans will begin to freeze from the night hemisphere and gradually spread to this hemisphere, and it will be many years before the entire ocean will be frozen up, at which point the plants and animals on the planet, in our hypothesis, will be extinct for the second time, and it is uncertain whether there will be some surviving fish under the ice of the ocean.

This is the scene when the earth is always in the daytime, the species are extinct, the air is dry, the sea is frozen, and this is an extremely cruel world.

If there were only night left in the world, then life on Earth would be extinct on a large scale, and the Earth would be frozen in ice. Without food**, humans would also become extinct one after another.

If this were the case, then it is likely that many plants would die, because life would cease without the action of daylight, and then it would be time for us humans to perish.

Without daylight, people would not be able to correctly judge the 24 hours of the day, and they would definitely use too much electricity, with lights on when they go to work and street lights on the road.

Then our world will be dark, and many plants will die, because of the lack of photosynthesis, they will have a hard time growing, and we will also lack food, so we will also be very hungry, and we will not dare to imagine how we can spend the world without daylight.

It will make people lose hope of living. The day is a symbol of hope and the beginning of all good things, but the night gives people an endless sense of loneliness.

If there is only night left in the world, no, during the day I feel that people's lives will be disrupted, and there is only night life, which I can't accept.

On a clear day, the sun is shining, but suddenly it is as dark as night, for a few tens of minutes, and for a long time it lasts into the night. This is neither a solar eclipse nor a precedent of a tornado. Although it is only a temporary situation at the regional level, this phenomenon has occurred in our country and in many parts of the world.

One afternoon in the autumn of 1944, in Banji, Liaoning Province, China, the clear sky suddenly turned dark, and I couldn't see my fingers. People panicked, screamed, and were in chaos, feeling that the sky was about to fall. After about an hour, the sky was bright again.

The sun was still shining, and the people who had gradually calmed down still remembered that strange moment.

On the morning of May 19, 1980, people in New England Reclamation District, USA, were busy going to work as usual. At 10 o'clock, it was suddenly dark, as if it had entered the middle of the night, and everyone was terrified. This phenomenon lasted until dawn the next day.

In Preston, England, there was also darkness during the day. On April 26, 1884, the sky darkened and it became darker, and it was about 20 minutes before sunlight returned.

According to the memories of people at the time, this phenomenon of darkness during the day occurred suddenly, and no abnormal signs were detected before, and no other anomalies occurred after that.

Why does this happen? So far, scientists have different theories, some say that it is related to volcanic eruptions, and some say that it is likely to be related to visitors from extraterrestrial planets. The latter view holds that when the extraterrestrial visitor passes over the Earth, it is silent, but its huge area forms a temporary darkness somewhere on the Earth.

To this day, this mysterious phenomenon remains a mystery.

Day-night alternation 1, the formation of day and night: We all know that the earth is a planet in the solar system, it is neither luminous nor transparent, it can only reflect the sun's rays, that is to say, the sun can only shine half of the earth at a certain time. Students, please look at this globe, if your eyes are the sun's rays, can you only see half of the earth?

The hemisphere that is irradiated by the sun is called the day hemisphere, and the other hemisphere that is not irradiated by the sun is called the night hemisphere, and the dividing line between the day and night hemisphere is called the morning and dusk line. So how do we distinguish between the morning line and the evening line? The picture on the left represents the morning line, from which we can see that the night hemisphere wants to transition to the day hemisphere, and the one on the right represents the dusk line, which is the transition from the night hemisphere to the day hemisphere.

That is to say, what we usually call the morning and dusk line or the morning and dusk circle is actually the sum of the morning line and the dusk line, which is a large circle on the surface of the earth.

We all know that the sun cannot be seen in the hemisphere in the dark state of night, that is, the night hemisphere, and in the day hemisphere, people in different places see the position or height of the sun in the sky is also different, which is the problem of the height of the sun. Let's take a look at the change in the height of the sun.

2. Changes in the height of the sun.

Change in solar height: Diurnal hemisphere (daytime) h > 0 morning and dusk line (horizon) h = 0

Night hemisphere (night) h < 0

3. The causes and cycles of day and night alternation.

Do you know how people kept time in ancient times before the advent of clocks and watches? (Student's answer) Yes, it is the sun (the stars or the moon at night) to arrange the living, resting, and productive labor, so the sun is used as the basic unit of time. One day, this time is neither long nor short For a sphere of such nature as the earth, its temperature difference between day and night will not be too large, thus ensuring the survival and development of living organisms on the earth, which is also a major advantage of the earth.

Second, the principle.

The so-called polar day means that the sun never sets and the sky is always bright, which is also called white night; The so-called polar night is the opposite of the polar day, the sun never comes out, and the sky is always dark. In the high latitudes of Antarctica, there is no "sunrise and sunset" rhythm of life, and there is no 24-hour day and night cycle. The alternation of day and night changes with increasing latitude, and the higher the latitude, the longer the polar day and the polar night.

At 90° south latitude, that is, at the South Pole, the alternation of day and night alternates for half a year, that is, the alternation of day and night there is a full year, half of the year is continuous day, half of the year is continuous night, and one day there is equivalent to a year on other continents. If you leave the South Pole, the lower the latitude, the more day or night it is, and the time of the polar day and night will gradually shorten. At 80°S, there are times when the polar day and night are other than the polar day and night, and there is a day-night cycle of 1 day and 24 hours.

If you are at the end of the polar day, the night is very short at first, and then the night is getting longer and longer, until finally it is all night, and the polar night begins. In the Antarctic Circle (66°33'S), there is only one full day (24 hours) of the year that is all day and one full day is all night. China's Antarctic Great Wall Station (62°13'S) is just outside the Antarctic Circle, and at one or two o'clock in the middle of the night in December, the sky is still cloudy and you can read and write with good eyesight.

This natural phenomenon of polar day and polar night also occurs at the North Pole, the other pole of the earth, but it occurs at the opposite time of the South Pole, and if the North Pole is in the polar day, the South Pole will be the polar night, and vice versa.

The formation of the polar day and the polar night is caused by the rotation of the earth around its own inclined axis as it orbits the sun in an elliptical orbit. It turns out that when the earth rotates, the earth's axis and its perpendicular line form an approximate inclination angle, so when the earth rotates, there is always one of the poles facing the sun for 6 months, and it is all daytime; The other pole is turned away from the sun, and it is all night. The North and South Poles are amazing natural phenomena that no other continent has.

When the soul is out of the body, don't be afraid and stay strong-willed. Under normal circumstances, day and night, it is easy to leave the body when you fall asleep.

When you are in love, there is only day, not night.