What is the White Nights phenomenon and why is it unique to high latitudes?

The rotation of the earth brings us the distinction between day and night, and we have learned this since childhood. But in some high latitudes, there is a magical natural phenomenon.

White Night", "White Night", as the name suggests, is the white night, in the northernmost Mohe River in China.

Nearby, summer is close to the summer solstice.

, the phenomenon of white nights occurs.

Above the red line is the area where the "white night" phenomenon can be seen in China: <>

Seeing this, many people may have questions:What is "White Nights"? How did the "White Nights" come to be?

And why is the "White Nights" phenomenon unique to high latitudes? 1. What is the "White Nights" phenomenon? The phenomenon of "white nights" refers to the fact that the sun goes down to the horizon in a certain area.

It can only reach a small angle, and due to the scattering of the atmosphere, it is not completely dark all night. Due to the long days and short nights in the local summer, the sky shows a view of dusk or dawn after sunset and before dawn, and it is not completely dark, so it is called the "white night" phenomenon.

2. What is the principle of the "White Nights" phenomenon? Since the Earth's exterior is surrounded by an atmosphere, the atmosphere at high altitudes can refract and scatter below the horizonSunlightTherefore, when the Sun is not lower than 18 ° below the horizon, due to the Earth's atmosphere.

, even at night, the sky is not completely dark.

Why does the "White Nights" phenomenon occur only at high latitudes? Since the phenomenon of "white nights" can occur only when the sun is not lower than 18 degrees below the horizon, it is difficult to meet this requirement in low latitudes, and the conditions for the formation of white nights are only available in high latitudes. However, although the "white nights" phenomenon only occurs at high latitudes, it changes when the latitude reaches a certain altitudePolar DayWhen reaching the Arctic Circle.

66°34 ), it becomes the polar day completely.

The "White Night" phenomenon is very simple, but it reflects the wonder of the universe, do you like this strange natural phenomenon?

White night refers to the day after the sun sets but it is not completely dark, that is, the night is like day. This is caused by the scattering of the sun by the atmosphere, as well as at lower latitudes, but it disappears more quickly.

It is the phenomenon that the sky will not be completely dark in some seasons in the high latitudes of China. Due to the direct range of sunlight, the phenomenon of white nights occurs only at high latitudes.

The phenomenon of white nights refers to the fact that the night of the day is also daytime. Because of the high latitudes, the sun shines on that place all day, so it's daytime.

Not accurate enough.

The White Night phenomenon is when the sun falls below the horizon at a very small angle in a region of latitude (mid to high latitudes, close to the Polar Circle, but outside the Polar Circle). Due to the scattering of the atmosphere, it was not completely dark all night.

The White Night phenomenon is due to the relationship between the deflection of the Earth's axis and the rotation and revolution of the Earth, and in the middle and high latitudes, it sometimes appears that the dusk appears to dawn before it has passed. The sun can only reach a small angle below the horizon. Due to the scattering of the atmosphere, it was not completely dark all night.

The area where the white night occurs starts at latitude 48°34, and the higher the latitude, the longer the white night appears, and the brighter the sky. After reaching the Arctic Circle (66°34, i.e. greater than 66°34 latitude) – that is, at high latitudes greater than 66°34, it becomes the polar day – and there are also white nights in the days before and after the polar day in this area.

In the northernmost part of China, near the Mohe River (belonging to the middle latitudes), the phenomenon of white nights occurs when the summer is close to the summer solstice.

Yes, the phenomenon of white nights occurs at high latitudes, and the phenomenon of white nights is the phenomenon of dawn followed by dusk in high latitudes, which is affected by the shadow of morning and dusk, because the earth's atmosphere has the effect of reflecting sunlight.

Do you want to ask about the polar night phenomenon? If it's a polar night, just remember that both the polar day and the night occur within the Arctic and Antarctic circles.

White night refers to the phenomenon in the middle and high latitudes, where the sun falls below the horizon and can only reach a small angle, and the sky cannot be completely dark. In the vicinity of Mohe, the northernmost part of our country, the phenomenon of white nights occurs when summer is approaching the summer solstice.

1. The phenomenon of white nightsWhite nights literally, that is, the sky does not completely get dark at night, and this phenomenon can only occur in the middle and high latitudes and close to the Arctic Circle, but outside the Arctic Circle. We know that because the Earth's axis is biased, the rotation of the earth also has a certain relationship, and in high latitudes, sometimes dawn will appear before dusk has passed. The area where white nights occur starts at latitude 48°36 minutes, and the higher the latitude, the longer the white nights occur and the sky is brighter.

2. The essence of the white night phenomenon on the morning and dusk line is that the earth rotates from west to east along the axis of rotation, and at the same time revolves around the sun. Since the Earth is an unluminous, opaque sphere, the Sun can only shine half of the Earth at any one time. At lower latitudes, regardless of where the direct sun shines at **, it will be included in this range.

Whether it's winter or summer, spring or autumn, there will always be a time when it gets completely dark. However, if it is a high latitude area, the direct point of the sun does not reach its land, and the phenomenon of white nights will occur.

3. Polar day and polar nightWhen the latitude gradually increases and reaches the Arctic and Antarctic circles, this phenomenon will become polar day. Polar day is a relatively excessive white night phenomenon, that is, a day is all daylight for 24 hours. During the Earth's revolution, one of the two poles must be facing the sun for six months, all in the daytime.

And the other pole will turn away from the sun, and it will be all night. This miraculous phenomenon in the North and South Poles is not found on other continents, and it is also caused by its high latitude.

White night refers to the phenomenon that the sun falls below the horizon at high latitudes (close to the polar circle, but not within the polar circle), but can only reach a small angle, and due to the scattering of the atmosphere, the sky cannot be completely dark all night, and it is still brighter. At lower latitudes, the sun is able to set completely below the ground level, so there is no white night, but a normal black night. Within the polar circle, the sun cannot fall below the horizon or stay below the horizon all the time, so there will be polar day and polar night.

That is, the sky is not completely dark all night, because of the relationship between the deflection of the earth's axis and the rotation and revolution of the earth.

Therefore, people who live in lower latitudes often see that it gets dark quickly, while people who live in middle and high latitudes see it more slowly.

In the summer in the middle and high latitudes, the phenomenon of shortening the night to dusk and connecting the afterglow with the dawn is called "white night". Because the phenomenon of white nights only occurs in the middle and high latitudes, it is not seen in the lower latitudes.

"White Night" means that the sun does not go down and the sky is bright 24 hours a day. At low latitudes, the angle of the sun is relatively small, and it will soon reach 18° into the night, so there will be no "white night" phenomenon.

The phenomenon is that after sunset in the evening, there is still a long time when the sky is bright, because the angular velocity of the sun setting is high and the sun sets faster at low latitudes.

White nights refer to the phenomenon that is not completely dark at night in some high latitudes. The lower latitudes are exposed to direct sunlight, so there are no white nights.

White nights are defined as areas where the sun reaches a certain degree of latitude and can only reach a small angle below the horizon. In other non-low-dimensional regions, the angle of the Sun is too large. At this time, it is daytime, and the phenomenon of white night cannot be formed.

"White Night" is actually that the sky is still very bright at night. Because the sun sets earlier at lower latitudes.

There are two special places on Earth, one is the North Pole and the other is the South Pole. These two places can be done without night or at night. White night means bright night, and light can be seen at night.

This is especially common in the polar regions and can also occur in areas close to the poles. The earth rotates obliquely, with the higher latitudes at the ends and the lower latitudes in the middle. The sun can easily reach the middle, so the white night phenomenon is not easy to occur at low latitudes.

D Question Analysis: In the summer at higher latitudes, the morning and dusk shadows often last for a long time, so that the twilight of the previous day has not ended, and the morning light of the next day has begun, and the whole night sky is bright from the hail to the oak, which is called "white night". The main reason for the collapse was due to the scattering of the atmosphere, and the sky did not completely darken all night.

Option d is correct.