What are the four dimensions in physics? What is a 4 dimensional space, and what is the difference b

Three-dimensional refers to length, height, and width, and four-dimensional is to add another spatial measure.

Notice, it's space.

It's hard to understand, right? That's right, we, as creatures of the three-dimensional universe, can never imagine concepts beyond three-dimensional. It's like a two-dimensional creature can't understand "height thickness".

Whether time is a dimension or not is still uncertain in the academic community. My personal view is that even if time is a dimension (in fact, I don't advocate considering time as a dimension), it is also the last dimension, which overrides all spatial dimensions, and all other dimensions are spatial dimensions except time.

Through theoretical calculations, human beings have been able to determine the basic theory of space in more than 30 dimensions (it seems, it may be higher), but it is only a theoretical ......Nothing more.

In physics, dimensions are not fixed to which quantities, and 3 dimensions can also not refer to the living space of our door, depending on the research question.

Three-dimensional is general space, and four-dimensional is three-dimensional space plus one-dimensional time.

That is, you are in the same place, and the meaning is the same in three-dimensional space; But in the four-dimensional space, we also need to consider the dimension of time, and if it is in the same place at different times, then the meaning is different.

There are many four dimensions of physics, except that there is space and time.

There are also space force fields, electric fields, which are combined in many dimensions. It's time to consider the problem.

Two-dimensional and three-dimensional should be very clear, in physics, the mind space is based on the definition of three-dimensional space and the timeline.

The fourth dimension is simply space-time – time and space. Space refers to the geometry of an object or the spatial position it is located in (and the x, y, z coordinates). Space-time is the study of the spatial position of moving objects (absolute when in motion) at different times.

We live in a 3-dimensional space, and the coordinate system is xyz 3 roots.

There are 4 coordinates in 4 dimensions, imagine for yourself.

The concept of four dimensions is introduced for the purpose of description, that is, time, because everything is changing, and of course the condition of objects is different at different times, and the introduction of time can be accurately described, so it deserves to be a dimensional number.

In fact, special relativity is largely a mathematical conclusion that is subject to nature.

I don't know if it's correct.

The mathematical concept of "space" is limited to the description of location and bearing, and does not involve time.

In classical physics, space is not related to time, so space in classical physics is actually a mathematical concept of space.

But relativistic mechanics holds that space and time are inseparably linked. Therefore, when describing the motion of an object, time can be added as an element. This is also known as the four-dimensional space.

That is, in addition to the three spatial dimensions of x, y, and z in mathematics, the dimension of time t is additionally added.

Three-dimensional generally refers to three coordinates in the spatial coordinate system, that is, the position of an object can be described with three coordinates, while the fourth dimension should refer to the time dimension, and the four dimensions of (x, y, z, t) can describe the motion of an object.

Why is four-dimensional space so difficult to understand How can we recognize cross-dimensional space.

According to Einstein's theory, our world is bound in 3 dimensions, for example, we can feel the length, width and height of objects, and we can also feel time (clocks) according to 2 or 3 dimensions, but we can't feel the wave of time, so we can't change time, and everything we come into contact with is bound in the 3-dimensional world.