I m going crazy, is the universe that we can feel now three dimensional or four dimensional?

The answer is: multidimensional.

But with our human cognitive system (sight, hearing, touch, etc.) we can only perceive three-dimensional existence.

Case in point: ants.

Ants are two-dimensional space creatures, although space is multi-dimensional, but the maximum limit of the ant's cognitive system is two-dimensional.

If we put an ant in the upper left corner of a piece of paper, roll it up and wait for the ant to walk by before reaching out.

You will find that ants magically "teleport" from a point in one two-dimensional world to a point in another two-dimensional world.

So we humans too, maybe we have four-dimensional beings looking at us all the time, and we have a hard time seeing them, or we misunderstand that they are just a regular sight.

We can feel the presence of time, but we can't see ourselves a minute ago and a minute later.

So we're in a three-dimensional space.

In fact, we can feel that the passage of time comes from many references: the rising and setting of the sun, the birth, old age, sickness and death of people...

If you are placed in a place where there is no reference, you will not feel the time.

It must be four-dimensional, and if it is three-dimensional, then our universe is frozen and stationary, without the change of time

Space coexists, zero exists in one mile, two dimensions exist in three dimensions, and so on, when three dimensions travel at a time speed is thinking, his time axis is stationary,! Already find my other answers in! Personal opinion.

Three-dimensional. Don't you remember the basic definition?

Creatures in the lower dimensions will never be able to perceive what is happening in the higher dimensions."

Forgot such a simple thing?

Our world is three-dimensional.

Three-dimensional space, in 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. A space where the location of a point is determined by three coordinates.

The objectively existing real space is three-dimensional space, with three measures: length, width, and height.

The concept of multi-dimensional space introduced in mathematics, physics and other disciplines is a scientific abstraction made on the basis of three-dimensional space. It is also called three-dimensional space.

We are three-dimensional space: 1-dimensional space is a line, 2-dimensional space is a surface, 3-dimensional space is three-dimensional, we are three-dimensional, living in 3-dimensional space, as for the 4-dimensional world, it is 1-dimensional time plus 3-dimensional space, the modern universe, which is now said to be three-dimensional space plus time, constitutes a four-dimensional space. If your speed is close to the speed of light, the energy of matter will change with the change of speed, and if it is a 4-dimensional space, you can travel through time.

The universe in which we live, there are other dimensions in the universe, such as the singularity has 14 dimensions) is composed of time and space, time = 1 dimension, space = 3 dimensions, and together it is a 4-dimensional world.

Imagine that we are going to look at what time it is, and when we look at our watch, a photon reflected from the watch hits our retina. What really touches our retina is the energy and momentum of these photons, and based on this information of the photons, our brain analyzes the time displayed by the watch. So we're actually in a space of energy and momentum.

A space made up of energy and momentum, this space is physically called --- momentum space. Similar to four-dimensional space-time, momentum space-time is also four-dimensional, and the comparison of four-dimensional space-time with momentum space-time is where one dimension is energy, and the other three dimensions are the three components of momentum.

On the surface, the momentum space constructed by scientists seems to be just a mathematical game, and the four-dimensional space has explained the macroscopic world well, so it seems unnecessary for us to construct a momentum space. But in some ways, momentum space is more real than four-dimensional space.

For example, in particle collisions, the particles collide at high speed and become some other particles, which involves the conversion of energy and momentum; When we look at distant objects with astronomical telescopes, all we really see is information about the energy and momentum of photons. At least from these observations, whether in the macrocosm or the microcosm, we may not live in time and space, but in a momentum space of energy and momentum.

The space in which we exist is multidimensional. The spaces are parallel and overlapping, but they are not connected to each other. It only takes a split second to get to another dimension, but we can't find a way to get there.

For a long time, people debated the dimensions of the world, until Einstein's "Theory of Relativity" came out, which basically established the dominance of four-dimensional space. But until now, our understanding of four-dimensional space has been limited.

Moreover, the exploration is endless, and we cannot deny the possibility of the existence of 5 dimensions.

The general consensus of the physics community is that the macrocosm we live in is a three-dimensional space, a four-dimensional space-time.

Three-dimensional space is easy to understand, three dimensions, each dimension has positive and negative two directions, up and down, left and right, front and back. The four-dimensional space-time, based on Einstein's special theory of relativity, does not have absolute time, and the time coordinates depend on the choice of reference system, so we need four coordinates to determine an event in the world we live in: x, y, z, t, where t is time.

This is where the four-dimensional space-time comes from.

However, it should be noted here that the time coordinate t belongs to the "space-time coordinates", not to the "spatial coordinates", so the rigorous statement is: three-dimensional space, four-dimensional space-time. There is a research direction called string theory at the frontier of modern physics, which studies the possibility of more dimensions in the microscopic world, and this theory is currently known as the most promising theory to reconcile the contradiction between quantum mechanics and relativity, but it seems to be only in the theoretical stage, there are many different statements, and it has not been verified by experiments, and even if it is correct, it only exists in the microcosm, and the macrocosm we live in is still as mentioned above, three-dimensional space, four-dimensional space-time.

Having written so much, you might as well say more, the so-called faster-than-light is considered impossible in the current physics world.

As for the other person's statement that we live in the fourth dimension all the time, but we just can't feel it, this is also not in line with the principles of science. I also said that we live in 10 or 100 dimensions all the time, but you just can't feel it. This argument simply does not make sense.

This brings us to the question of epistemology in philosophy, which I will not talk about here.

The space we live in is called three-dimensional space, and although there is a flow of time, the length of the timeline of three-dimensional space at each moment is 0.

For example, the reason why a two-dimensional space is two-dimensional is because it has only length and width, and the height is zero. Only by integrating all the two-dimensional spaces on a high length can there be a third-dimensional length, which is a three-dimensional space. And the fourth dimension of our three-dimensional space at any given moment is 0.

So we're in a three-dimensional space.

Only when we integrate the three-dimensional space at all points in time within a certain length of time can we have a fourth-dimensional length, which is called a four-dimensional space.

Of course, we live in a three-dimensional space, a static space; Four-dimensional space is dynamic space because there is also a timeline...

The space we live in is called a four-dimensional space, and according to Einstein's concept, our universe is made up of time and space. The relationship between time and space is that there is an additional time axis in the structure of space compared with the three axes of length, width and height of ordinary three-dimensional space, and this time axis is an axis of imaginary values.

dimension.

One dimension is a line, two dimensions is a surface, three dimensions is static space, and four dimensions is dynamic space (because of time), of course, this is just a statement, not that the fourth dimension is time.

Live in four dimensions. Three dimensions are only length, width and height. You can never move in three dimensions. Stationary objects.

Hungry... Dimensions can be defined, but spatially they are three-dimensional, but not necessarily in general.

Dimension, length, width and height 3 axes, we can control the time, but we can not control it. 5

How to prove that we live in three-dimensional space.