What is the reason for the diurnal phenomenon on Earth?

Day and night are a combination of day and night. The alternation of day and night is a natural phenomenon formed by the rotation of the earth under the irradiation of the sun.

The earth is a non-luminous and opaque sphere, and the sunlight can only illuminate half of the sphere at the same moment, half of the world illuminated by sunlight is day, and half of the earth that is not illuminated by sunlight is night. The dividing line (circle) between the day and night hemispheres is called the morning and dusk line (circle).

Day and night are produced by rotation, which is called "solar day", but the length of day and night is not equal to the rotation period, because after the earth's rotation for one week, it rotates at the same time, and the revolution changes the relative angle of the earth towards the sun, and day and night are seen in terms of the range of the sun shining on the earth, so a day and night are 3 minutes and 56 seconds longer than the rotation period. When the Earth rotates, the ground facing the Sun is called "Day", and the ground facing away from the Sun is called "Night". This is how day and night are formed.

After the vernal equinox, there is more sunshine in the northern hemisphere, so the nights are shorter and the days are longer in the northern hemisphere, and the opposite is true in the southern hemisphere; After the autumnal equinox, there is more sunshine in the southern hemisphere, so the days are shorter and the nights are longer in the northern hemisphere, while the opposite is true in the southern hemisphere.

The reason why there is a diurnal phenomenon on the earth is that the earth is a sphere that is neither luminous nor opaque, and at any one time the sun can only illuminate half of the earth, forming the day hemisphere and the night hemisphere, forming the day and night on the earth.

Good luck with your studies!

The rotation of the Earth.

The reason for the occurrence of the alternation of day and night on Earth is mainly because of the rotation of the Earth. Another reason is that the Earth does not emit light and is not transparent. The rotation of the Earth.

The cycle is 1 solar day.

i.e. 24 hours.

The reason for the occurrence of the alternation of day and night on Earth is mainly because of the rotation of the Earth. The Earth rotates from west to east on its axis of rotation, rotating counterclockwise from the north pole and clockwise from the south pole. The Earth's axis of rotation and the ecliptic plane.

The degree is angled, perpendicular to the equatorial plane. Earth's rotation is an important form of motion of the Earth, and the average angular velocity of rotation.

is 10-3 degrees of seconds, the linear velocity of rotation at the Earth's equator.

for 465 m sec. It takes 23 hours and 56 minutes for the Earth to rotate around and increases or decreases by 3 to 4 thousandths of a second every 10 years.

Day and night alternate. 1.Cause: The earth does not emit light or is transparent, and the rotation of the earth.

2.Period: 1 solar day, i.e. 24 hours.

3.Morning and dusk lines.

Meaning: The dividing line between the day and night hemispheres.

Including morning and evening lines. Interpretation of the morning and dusk lines: 1 rotation method:

Follow the direction of the earth's rotation, from night to day, which is the morning line; From day to night, it is dusk. 2. Time method: 6 o'clock local time on the equator corresponds to the morning line; It is 18 o'clock on the equator, which corresponds to the dusk line.

3. Orientation method: the east side of the night hemisphere is the morning line, and the west side is the evening line; The eastern side of the day hemisphere is the dusk line, and the western side is the morning line.

Deflection of an object moving horizontally along the surface.

The rotation of the Earth also causes objects moving horizontally in any direction on the Earth to deviate from the initial direction of their motion. If the direction of the moving object is used, the Northern Hemisphere.

Horizontal objects are biased to the right, and the Southern Hemisphere is biased to the left.

The reason for the deflection of the direction of motion of horizontal objects on the surface is due to the fact that objects have inertia and try to maintain their speed and direction. As mentioned above, the horizontal direction of the earth is based on the meridian and the parallel, the direction of the meridian is the north-south direction, and the direction of the latitude line is the east-west direction. However, due to the rotation of the earth, the meridians and latitudes, which are the standard for north-south and east-west directions, are deflected with the autobiography of the earth.

As a result, the horizontal motion of an object that really maintains the same direction is deflected relative to the direction on the earth.

The world is unpredictable, every day is strange, day and night change, day and night change. Only the diurnal cycle of plants can grow, animals can grow, and we humans can know the changes of time. And the change of day and night also brings us time to rest and sleep, and also calls the different beautiful scenes between day and night.

There are many reasons for the phenomenon of day and night, and here I will express my humble opinion, I think there are three reasons: first, it is related to the rotation of the earth; second, it is related to the angle of illumination of the sun; Third, it has to do with the transparency of the planet. <>

Every object in the world is in constant motion every day, and the Earth is no exception, and the Earth rotates every day with an average angular velocity in radians. The place where the sunlight can reach is the daytime, and the place where the sunlight does not reach the night is the night. In the solar system, the position of the sun is constant, and the other planets revolve around the sun, so the irradiation of the sun will not change, so the rotation of the earth is one of the reasons for the formation of day and night cycle.

With the rotation of the earth, the angle of the sun is also constantly changing, and it is precisely because of this that the change of day and night is more obvious, so there are such stages of change as morning, day, dusk, and night. Therefore, the reason for the phenomenon of day and night change is also related to the angle of the sun. <>

As we all know, the earth does not emit light, it is also a solid, opaque planet, and in the solar system, only the sun is constantly nuclear luminescence, and the sun's light comes to the earth after several light years to bring us light. If our earth were a translucent object, then we would not have such a phenomenon as day and night, but only an endless long day. We didn't even know there was a night, and we wouldn't necessarily survive.

So the Earth is an entity, opaque planet, which is the most important condition and cause for the production of day and night. <>

To sum up, the change of day and night has brought us many benefits, and we are inseparable from the change of day and night, and the reason for the change of day and night is related to the rotation of the earth, the angle of the sun, and the transparency of the earth. This is also my opinion, if there is anything to add, please leave a message in the comment area.

The reason for the formation of the phenomenon of day and night on the earth is the rotation of the earth. The Earth rotates from west to east around its axis. So we see the sun rising in the east and setting in the west; The moon rises in the east and sets in the west; The stars rise in the east and set in the west.

Because of the rotation of the earth, it is also related to co-rotation, related to sunlight, and related to the central axis of the earth, and the sun's light will shine on the north and south poles, which will be the case.

Mainly because the earth rotates, the earth does not emit light, the earth has a rotation cycle, there will be a situation of day and night alternation, the latitude of the earth is different, so the phenomenon of day and night is formed.

The reason for this phenomenon is that the earth has been rotating and revolving around the sun, and in the process of revolving around the sun, one side will not shine on the sun, so there will be a diurnal situation.

The diurnal phenomenon is that half of the sun can be illuminated and the other half cannot be illuminated.

There are some very strange things in life that we never know if we don't explore them at this time. But we all know that there is a phenomenon of day and night on the earth, especially in some places where there is a polar day or a polar night. But many people don't know the reason for this phenomenon, so today we are going to talk about this problem.

Depending on the angle of the sun's illumination, the generation of day and night, that is, the so-called solar heat, then the length of day and night varies. That is to say, the rotation of the earth has a period, after the rotation of the earth for a week, and then they start to revolution, then the revolution is the earth, and it has some changes in some angles relative to the sun. However, day and night refer to the extent where the sun shines above the earth, so the general situation of day and night is 3 minutes and 56 seconds longer than the rotation period.

Then when the earth rotates, that is, the side that is equivalent to facing the sun is called day, and the side facing the sun is called night, so day and night are formed in this way.

The change in the length of day and night is on the vernal equinox, when the northern hemisphere has more sunshine at this time, so the northern hemisphere is in the moment when the night is short and the day is long. Then the Southern Hemisphere is the opposite at this time, it has more nights, so at this time the Southern Hemisphere presents long nights and short days. Then after the autumnal equinox, the situation of the two is naturally reversed.

Moreover, the earth is a non-luminous and opaque sphere, so when the sun shines on one side of him, he can only illuminate one hemisphere. So this category that is illuminated by the sun, it is called day, and if it is not illuminated by the sun to this hemisphere, it is night.

Actively explore the question and learn from this question, even the facts that we can see in our lives, or the things that we have already felt. If we don't explore it, then you don't know why it is, and we don't even know how it came into being or how it came to be. Therefore, when we find something very strange in our life, or something we don't understand, we should actively explore it.

This is because the earth is constantly rotating, so this situation occurs, and there is a phenomenon of day and night.

The reason for the occurrence of the phenomenon of day and night: the earth is a sphere that does not emit light and is opaque, and at the same moment, only half of the earth is facing the sun, and the sunny hemisphere forms day, and the sun-facing hemisphere forms night.

In fact, because the earth has no bright light, it is completely illuminated by sunlight, so adding the rotation and revolution of the earth will lead to a day and night situation.

The main reason is that the earth is an opaque and non-luminous sphere, and the earth is constantly rotating around the earth, so the phenomenon of day and night will occur.

The main reason for this phenomenon is that when the earth rotates, the side that shines is daytime and the side that does not shine is night.

There are three points each:

1: The rotation of the Earth.

Reason: The phenomenon of polar day and night occurs only in the Arctic and Antarctic Circles, above and below the Earth. Normally, when the sun shines directly on one side of the ground, the Arctic or Antarctic Circle produces a polar day.

Of course, when there is a polar day in one area, there is a polar night in another place. Think of it as equilibrium.

2: The revolution of the Earth.

Reason: If it is only because of the rotation of the earth, it is impossible to produce polar day or polar night. Therefore, the earth must be exposed to light for a long time to produce polar day and polar night. Therefore, it is only for an excessively long period of time that the fact of the polar day or polar night can be correctly explained.

3: The tilt of the earth's axis.

Why: From Polaris, we know that the Earth's axis is tilted all the time. However, it is precisely because of the tilt of the Earth's axis that the polar day and night produced by the Arctic and Antarctic Circles are more distinct.

Therefore, this is also the reason why when there is a polar day in one circle, the polar night in the other circle, and the two circles are just the opposite.

ps: I relied on my own knowledge, and I definitely didn't copy books.

1. Because of the sun's rays, there is a diurnal phenomenon.

2. Because the earth rotates, there is a phenomenon of day and night.

3. Because of the existence and orbital movement of the earth's yellow and red angles, the length of day and night changes.

The earth's day-night cycle is caused by rotation, so why does the earth keep rotating?

The reason why the Earth has a diurnal phenomenon : The Earth is a non-luminous and opaque sphere.

Causes of the phenomenon of day-night alternation:1The earth itself does not emit light and is opaque. 2.The Earth is constantly rotating.

Reason: The Earth's rotation causes the alternation of day and night at various points on the surface. In astronomy, the dividing line between the day and night hemispheres is called the morning and dusk line.

The morning and dusk lines scatter the two parts of the day arc and the night arc of the weft coil through which it passes. The length of the day and night arcs determines the length of day and night in a place.

Rule: The length of day and night depends on the situation in which the morning and dusk circles divide the parallels. In general, the parallels are divided into two parts by the morning and dusk circles

The part located in the diurnal hemisphere is called the diurnal arc digger; The part located in the night hemisphere is called the night arc. The arc length of the day and night arcs determines the day and night lengths of the place: the arc length is 15 degrees, which is converted into 1 hour.