Is it really possible to have a two dimensional world? If so, how to understand it?

Dimensions, also known as dimensions, are the number of independent parameters in mathematics. In the realm of physics and philosophy, it refers to the number of independent space-time coordinates. Dimension 0 is an infinitesimal point with no length.

1 dimension is an infinitely long line with only length. 2D is a plane that is made up of an area made up of length and width (or part of a curve). 3 dimensions is 2 dimensions plus height to make up the volume.

The 4 dimensions are divided into 4 dimensions in time and space, and people often refer to the transfer of objects in time. (4 dimensions, to be exact, there are two kinds.) 1.

Four-dimensional space-time refers to three-dimensional space plus one-dimensional time. 2.Four-dimensional space refers to only four dimensions of space.

Four-dimensional motion gives rise to five-dimensional.

The sixth dimension refers to thought, independent of time and space in common sense, and the sixth dimension is similar in nature to time, both beyond the physical realm, but higher than time. The universe in which we live cannot transcend the sixth dimension, but only operates within it. Just like a computer program, the program itself can only be run on a computer, although the results of the program's execution may have an impact on time and space.

Broadly speaking, dimension is the number of abstract concepts that are "connected", and the abstract concept of "connected" refers to an abstract concept that is connected by multiple abstract concepts, and any abstract concept that composes it is related, and the number of abstract concepts that make up it is the dimension it changes, such as area. This concept is based on the idea that everything is relatively related.

From a philosophical point of view, the "thinking perspective" from which people observe, think, and express something is referred to as "dimension". For example, when people observe and think about the "moon", they can describe it from the three perspectives of "content, time, and space" of the moon. It can also be described from the three perspectives of "carrier, energy, and information" of the moon. <>

Zero-dimension can be seen as a point, but there is no length, width or height (you can't see a point in 3D space). One dimension is a line, and two dimensions are a piece of paper. Similarly, there is no width and height in one dimension, and there is no height in two dimensions.

Again, our world is three-dimensional (length, width and height), but it is four-dimensional space-time (length, width and height plus time).

The space you live in is also made up of Erwei, and the Erwei world is your shadow!

What is on a plane is two-dimensional. Two-dimensional, that is, left and right, up and down, there is no front and back. What is on a piece of paper can be seen as two-dimensional.

That is, there is only area, no volume. Two-dimensional is a kind of flat technology, such as ordinary flat animation, called two-dimensional animation, referred to as two-dimensional. (Three-dimensional is three-dimensional).

In addition, the imagination in the mind can also be seen as two-dimensional. Two-dimensional is a kind of flat technology, such as ordinary flat animation, called two-dimensional animation, referred to as two-dimensional. (Three-dimensional is three-dimensional).

In mathematics and physics, where the first dimension is too simple and the third dimension is too complex, the two-dimensional "plain" just allows researchers to have enough space to develop their talents. But 2D isn't just a virtual space on scratch paper, it's also valuable in reality.

Two-dimensional is a kind of flat technology, such as ordinary flat animation, called two-dimensional animation, referred to as two-dimensional. (Three-dimensional is three-dimensional). In mathematics and physics, where the first dimension is too simple and the third dimension is too complex, the two-dimensional "plain" just allows researchers to have enough space to develop their talents.

But 2D isn't just a virtual space on scratch paper, it's also valuable in reality. <>

In the real world, there is no truly two-dimensional world. However, the two-dimensional world is an abstract concept in scientific research that is used to help us understand and study certain phenomena and problems.

In mathematics and physics, we can study plane geometry and two-dimensional physics problems by assuming the existence of a two-dimensional world. In this hypothetical two-dimensional world, all objects are flat, with no thickness or depth, only length and width. This hypothetical two-dimensional world makes it easier to study plane geometry and two-dimensional physics, such as studying the properties of plane figures, studying two-dimensional electromagnetic fields, and so on.

In addition, the two-dimensional world is also a very important concept in computer graphics. In computer graphics, we can simulate the two-dimensional world by projecting the three-dimensional world onto a two-dimensional planar limb in order to better present and process images and data.

Therefore, although the true two-dimensional world does not exist in reality, in scientific research, the two-dimensional world is a very useful concept and tool that can help us better understand and study certain phenomena and problems.

Proton really can.

The "Zhizi" made by the Trisolarans in "The Three-Body Problem" in order to monitor the earth is to change protons from three-dimensional low-dimensional to two-dimensional.

Proton Introduction:

In the book, the Trisolarans gathered the high-end technology of the entire civilization to create a Zhizi, which itself is by passing a microscopic particle through two dimensions, and then completing a complex computer construction on it, and then accelerating to the earth at close to the speed of light, and at the same time creating the Zhizi to create a pair of quantum pairs to achieve monitoring of the earth.

The most difficult thing to explain here is the two-dimensional process. In fact, Da Liu only used the superstring theory and the M theory, and there are a total of ten dimensions in space, but the three dimensions we observe are relatively broad, and the remaining dimensions are curled up in a saddle shape, and their scale is as small as Planck's scale.

There is another place where Da Liu involves dimensions in the three-body problem, Peiyin is a two-way foil, in fact, this ** has the same fatal flaw as the two-dimensional of Zhizi, that is, we can't observe everything in the two-dimensional in three dimensions.

In terms of description, everything in the universe is an external reaction of the vibration of energy strings, but there is no such description in the book The Three-Body Problem. In short, Da Liu just used this logical concept, and actually didn't have a deep meaning.

After all, string theory itself has too many branches, and one can only excite the cutting-edge science based on mathematical models.

The so-called two-dimensional space refers to the plane, the one-dimensional space is a straight line, the three-dimensional space is three-dimensional, and there is also a theory that the three-dimensional space composed of length, width and height plus the dimension of time constitutes a four-dimensional space.

Cells are all three-dimensional organisms, ants are only a special case of behavior, not two-dimensional organisms, dimensions are just mathematical concepts.

It should exist, just as human beings discovered the four-dimensional element of time in three dimensions, and there will be 10* with the development of the times in the future

There are two-dimensional spaces in the world

Two-dimensional space refers to a plane space composed of only two elements, length and width (in geometry, the x-axis and y-axis), which only extend to the plane in which it is located.

Two-dimensional space is also a term in fine arts, for example, painting is to show things in three-dimensional space (three-dimensional space) in two-dimensional space.

Three-dimensional objects can disappear from one place and appear in another in two-dimensional.

Do we really live in two-dimensional space? There is no center in the universe, and the center of the universe is in **.

There should be none, imagination deserves praise.

Hello dear is not in a universe three dimensions is three-dimensional, two-dimensional refers to the plane. Two-dimensional can also refer to space, two-dimensional world only refers to the plane, there can be multiple figures, there are only two straight lines perpendicular to each other, the three-dimensional world refers to the space, "contains a two-dimensional plane", there are and only three straight lines perpendicular to each other, we should be in three-dimensional space, two-dimensional world, for example, the content on a piece of paper, only two squares, the letter cherry blossom carries the direction, that is, up and down, left and right; Three-dimensional means that the space we are in has three directions: up and down, left and right, front and back; Creatures in the three-dimensional world can make things in two dimensions. It's a law of nature, it's not man-made, we just give them a name, and what slides on a plane is two-dimensional.

Two-dimensional, that is, left and right, up and down, there is no front and back. What is on a piece of paper can be seen as two-dimensional.

Shadows actually exist. It is formed by the straight propagation of light.

Shadow is a darker area formed by an object that blocks the propagation of light and cannot pass through an opaque object, which is what we often call a shadow, and it is an optical phenomenon.

There are two types of shadows: umbra and penumbra

If you look closely at the shadows under the electric light, you will also notice that the shadows are particularly dark in the middle and slightly lighter around them. The particularly dark part in the middle of the shadow is called the umbra, and the dark part around it is called the penumbra. The occurrence of these phenomena is closely related to the linear propagation of light.

According to the above principle, scientists have made a shadowless lamp for surgery. It arranges the lamps with great luminous intensity into a circle on the lamp panel to form a large area of light source. In this way, the light can be irradiated to the operating table from different angles, which not only ensures that the surgical field of vision has sufficient brightness, but also does not produce obvious umbra, so it is named shadowless lamp.

I hope I can help you with your doubts.

In the two-dimensional world, there may be life, netizens: Do the people in the cartoon really exist?

In the context of classical physics, the answer to this question is obvious: there is no such thing as a two-dimensional world. Because in classical physics, all actual objects have volume.

In the context of quantum physics, however, the answer to this question becomes much more interesting: we can construct a "quasi-two-dimensional" system to simulate a two-dimensional world. This does not mean that we can construct a quantum system with zero thickness - in fact, this system has thickness, and this thickness can be very large compared to the "size" of the microscopic particles - but since the energy levels of the quantum system are discrete, the "motion" of the microscopic particles in the direction of "thickness" may consume a lot of energy, so that under very low temperatures, the motion in this direction will actually be in a state of "freezing". In this way, the microscopic particles are confined to a two-dimensional system.

In reality, physicists have realized many quasi-two-dimensional systems, such as two-dimensional electron gases in heterojunctions, such as two-dimensional optical lattices, and single-layer graphene.

In the context of classical physics, the answer to this question is obvious: there is no such thing as a two-dimensional world. Because in classical physics, all actual objects have volume.

In the context of quantum physics, however, the answer to this question becomes much more interesting: we can construct a "quasi-two-dimensional" system to simulate a two-dimensional world. This does not mean that we can construct a quantum system with zero thickness - in fact, this system has thickness, and this thickness can be very large compared to the "size" of the microscopic particles - but since the energy levels of the quantum system are discrete, the "motion" of the microscopic particles in the direction of "thickness" may consume a lot of energy, so that under very low temperatures, the motion in this direction will actually be in a state of "freezing". In this way, the microscopic particles are confined to a two-dimensional system.

In reality, physicists have realized many quasi-two-dimensional systems, such as two-dimensional electron gases in heterojunctions, such as two-dimensional optical lattices, and single-layer graphene. <>

If a two-dimensional world exists and is visible, it should be composed of flat figures, lines, and points. In the eyes of two-dimensional life, the world is composed of points and line segments, and no matter how complex the figure is in the three-dimensional eyes, in the two-dimensional we can only see a line segment, just like when we stand outside the city wall and look at the city. A two-dimensional object can only move in a pan-forward, backward, left, and right, and if it is in front of a closed circle, it cannot enter the circle, but with the help of three-dimensional forces, it can break away from the two-dimensional and enter the circle from a three-dimensional height without destroying the circle.