What is the difference between a three dimensional world and a four dimensional world?

The difference between four-dimensional and three-dimensional is mainly that there is a difference in time dimension, four-dimensional refers to the video, which is dynamic, while three-dimensional refers to **, static.

Four-dimensional color ultrasound is a four-dimensional medical color ultrasound imaging technology, which is suitable for the examination of various soft tissue diseases such as heart, liver, gallbladder, spleen, pancreas, obstetrics and gynecology, peripheral blood vessels, and superficial organs. Three-dimensional color ultrasound is a color ultrasound diagnostic instrument, and its function is the same as that of ordinary color ultrasound. The main advantage of color Doppler ultrasound in obstetrics and gynecology is to distinguish benign and malignant tumors and assess umbilical cord disease, fetal congenital heart disease, and placental function.

Infertility and pelvic varices are diagnosed by observation of the blood flow spectrum. If you find any abnormalities in your body after the examination, you need to be in time to avoid aggravation.

Each of us makes up a kind of visible and invisible space composed of inner energy and external matter, which is called the three-dimensional world. The four-dimensional world that we usually hear about most often is the four-dimensional world formed by adding a time dimension to the three-dimensional space-time.

Four-dimensional spaceThere is one more dimension than the three-dimensional, and it is precisely because of the existence of this dimension that the four-dimensional beings are thereThree-dimensional spaceBasically anything, no one can really beat it.

First of all, let's interpret the dimensional world in detail, the so-called two-dimensional world is composed of countless one-dimensional worlds, and three-dimensional is composed of countless two-dimensional worlds. In our opinion, one dimension is a point, two dimensions is a surface, and three dimensions is a three-dimensional space.

Human beings live in three-dimensional space and want to make two-dimensional space.

The creatures can't escape, and it's relatively easy, mainly because three-dimensional is more multi-directional than two-dimensional.

In the same way, the four-dimensional space is also more multi-directional than the three-dimensional space, and if you want to lock up a human in the three-dimensional space, as long as you completely enclose him in a box, he will not be able to escape. But the four-dimensional space cannot be trapped by this means, because it has one more direction than humans, which is also a direction that humans cannot touch.

Human beings live in three-dimensional space, and what is the four-dimensional space is not clear to everyone, so we can only understand it by calculation. It has been suggested that four-dimensional space is a combination of three-dimensional space and the dimension of time, but this argument is somewhat ridiculous and not very credible. After all, human beings can't really explore the products of the four-dimensional space, so everything related to the four-dimensional space mentioned is just speculation, and it cannot be concluded with 100% certainty.

Some people think that the Klein bottle.

It is a four-dimensional space, and it is impossible to create a complete one in three-dimensional space, which is true, maybe one day when human beings really develop and progress enough to enter the four-dimensional space, many things will have accurate answers.

The difference between the three-dimensional world and the four-dimensional world is that the composition is different, the characteristics are different, and the uses are different.

Human beings live in three-dimensional space, which can also be said to live in four-dimensional space-time, so they have a good understanding of their own space, that is, the things we see are three-dimensional, with three dimensions of length, width and height, and the time axis runs through it, with one-dimensional forwardness, that is, it will not pause and never return.

In Einstein's theory of relativity, space-time and matter are one, they are born and die at the same time, and do not exist separately. Three-dimensional space, that is, four-dimensional space-time, is the lowest latitude of the real world that constitutes our existence, and adding one dimension to this dimension is four-dimensional space and five-dimensional space-time.

Space features

Because space is the container of matter, without this container there is no matter, and matter is the content of space, and without this content, there is no need for space. Time is a measure of the movement and change of matter in space, matter and space are constantly changing, everything is moving forward from birth to death, there is no time, symbolizing that everything will come to a halt and come to naught.

The difference between three-dimensional space and four-dimensional space is obviously that there is one more spatial dimension, but it is precisely such a spatial dimension that is another world. There is a fragment in Da Liu's "Three-Body Problem", that is, the story of "Heart Thief", where a person is stolen from his heart but there are no wound marks on the appearance, so it is obvious that the heart was taken from the fourth spatial dimension.

A two-dimensional world is only a flat surface and can have multiple shapes, with and only two straight lines perpendicular to each other. A three-dimensional world is a space that contains a two-dimensional plane with only three straight lines perpendicular to each other.

Two-dimensional, that is, left and right, up and down, there is no front and back. The content on a piece of paper can be seen as two-dimensional. That is, there is only an area, not a three-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 refers to the spatial system composed of a direction vector in the two-dimensional system of the plane.

The so-called three-dimensional, according to popular theory, is just three directions that are artificially prescribed for each other to rise and intersect (perpendicular is a very characteristic understanding), and with this three-dimensional coordinate, it seems that the position of any point in the whole world can be determined. It turns out that three-dimensional is to determine the position.

Three-dimensional is the three axes of the coordinate axis, namely the x-axis, the y-axis, and the z-axis, where x represents the left and right space, y represents the upper and lower space, and z represents the space before and after, so that the three-dimensional sense of human vision is formed, and the three-dimensional animation is the three-dimensional animation made by the three-dimensional production software, so as to realize the trend of redevelopment.

The so-called three-dimensional space refers to the space we are in, which can be understood as having a front and back -- up and down -- left and right, and if time exists as a substance, then time is a four-dimensional space. But it is not difficult to understand that you can go back to the past at will in time, but it should be understood as a whole"Just now"with"Now"It's a different substance, but you can't go back"Just now"with"In the past" 。

Three-dimensional is composed of two dimensions, two-dimensional means that there are only two directions interleaved, and a two-dimensional and a one-dimensional are superimposed together to obtain three dimensions.

Three-dimensional is three-dimensional, but the front and back, left and right, and up and down are only relative to the viewpoint of observation. There is no absolute front and back, left and right, up and down.

The four-dimensional world is a four-dimensional world composed of the addition of a time dimension to the three-dimensional space-time.

Four-dimensional, or four-dimensional, is a spatial concept. In physics, the number of space-time coordinates is described by dimensions, and four dimensions are four dimensions, which are composed of an infinite number of three dimensions, and three dimensions are composed of an infinite number of two dimensions. The composition of other high-dimensional dimensions is so on, and the dimensions above three dimensions are collectively referred to as high-dimensional.

Dimension is a spatial concept, and different dimensions represent different spaces. For example, one-dimensional space refers to straight lines; Two-dimensional space refers to a flat surface; Three-dimensional space refers to three-dimensional space. Our universe has large, easy-to-see dimensions like water pipes extending horizontally, and there are dimensions that are constricted like water pipes in horizontal circles.

Four-dimensional space

Four-dimensional space, also known as chain simplification "Euclidean four-dimensional space", is a standard Euclidean space. It is a mathematical concept that can be extended to n-dimensional canopy trousers; The fourth dimension of four-dimensional space refers to the spatial dimension of the same nature as x, y, and z.

In physics and mathematics, a sequence of n numbers can be understood as positions in an n-dimensional space. When n = 4, the set of all such positions is called a four-dimensional space. The four-dimensional space is different from the three-dimensional space that people live in because there is one more dimension.

Through the evolution of one-dimensional, two-dimensional, and three-dimensional space, some conjectures about four-dimensional space have been proposed. Although these conjectures cannot be proven correct now, many scientific theories are started by conjectures. Nowadays, scientific theories are generally based on the summary of phenomena, and there is no accurate and clear understanding of the phenomena in the four-dimensional space, or the phenomena are seen but do not think that the phenomena are caused by the four-dimensional space.

Three-dimensional world: also known as three-dimensional space, daily life can refer to the space composed of three dimensions: length, width and height. Moreover, the term "three-dimensional space" used in daily life often refers to three-dimensional Euclidean space.

The position of the point is determined by the space of the three seat wheel relabels.

The objectively existing real space is three-dimensional space, with three measures: length, width, and height. The concept of multi-dimensional space, which is introduced in mathematics, physics and other disciplines, is a scientific abstraction made on the basis of three-dimensional space, also known as three-dimensional space.

For a long time in history, three-dimensional space was considered a mathematical model of the space we live in. Physicists at the time believed that space was flat. Since the twentieth century, the discovery of non-Euclidean geometry has opened up other possibilities for the nature of real space.

The theory of relativity and the corresponding mathematical description: Minkowski space-time treats time and space as a whole as a four-dimensional continuum. After the advent of string theory, it is no longer enough to describe the universe in reality in three-dimensional space, but it is necessary to use higher-dimensional mathematical models, such as ten-dimensional space talk lead.