Why are various invisible fields such as magnetic fields and gravitational fields also counted as

Since we can ask this question, we must first understand what a field is, a field is a part of the structure of space, and a magnetic field is the part of space that is affected by electromagnetism, and when matter is in this space, it will be affected by force, which is magnetism, electricity, or gravity, and what is affected is in what field.

The theory of relativity holds that a charge moves relative to an observer, who, in the eyes of the observer, produces a magnetic field in addition to an electric field in the surrounding space, but in the eyes of another observer who moves with the charge, the charge is stationary and there is no magnetic field around it. Since the magnetic field is a substance, how can it be seen by one person to be there and not to another?Think about it, what substances in nature seem to be there in one person and not in another?

How is it possible that there is an object that exists somewhere in space, and one person says it is real and one person says it does not exist, and both statements are correct

Many people immediately say that the theory of relativity is wrong and that things are not that simple. If we assume that the theory of relativity is correct, we can actually make judgments about the nature of the magnetic field by grasping this epistemic contradiction. We should not regard the nature of the electromagnetic field as a special substance, and the essence of the field is a property exhibited by the motion of the particles of the object with respect to our observer, rather than the object itself.

So the magnetic field, the gravitational field, these fields are not static, they are always changing and producing a change of form, so I think this thing is an object.

Because this is something that really exists, physics is defined as matter.

Because he is real, though he cannot see or touch.

Although it is stipulated that the glass rod rubbed by silk has a positive charge, and the rubber rod rubbed by fur has a negative charge. But the internal cause is not investigated.

It is not difficult to understand that the interaction between any matter cannot be a bare contact between subatoms, but only a field contact.

The glass rod rubbed by silk has a positive charge, and the rubber rod rubbed by fur has a negative charge.

It is not the visible that can be called material, and the invisible is also high-tech.

That's why we need physicists, and we can only explain it if we dig deeper.

I think it should be something that can be seen to be called a substance.

The field is a special substance, invisible and intangible, but it does exist.

That's where we get a hard time figuring out.

Because that's the definition of physics.

All attraction is negative pressure. For example, if the syringe sucks water in, is it the piston that sucks the water in? Or is it atmospheric pressure that pushes the water in? When the apple falls to the ground, is it the earth that sucks the apple down? Or did the space field crush the apple?

There are two spatial forms of matter: one is physical matter (gas, liquid, solid object and even social organization), and the other is energy field matter (electric field, magnetic field, gravitational field, electromagnetic field, etc.).Solid matter occupies exclusive space, while energetic field matter can share space but also has spatial attributes such as directionality.

The field is energy, and energy can be converted into mass, so it can be said that the field is matter! Whether it is a magnetic field, an electric field, or a gravitational field, all fields are vector quantities including strong fields and weak fields, all fields can distort space and time, all masses can also distort time and space, and most importantly, distortion is different from perturbation, distortion increases with the increase of mass (energy), there is a concept of change time and smooth change time, which is mathematically represented by square (square root), when the smooth change time is transformed into change time when it moves in a circle, and the change time can produce perturbations, The disturbance field is only related to the disturbance mode, no matter what field can be converted into each other, the disturbance of the electromagnetic field and the strong field can produce gravitational waves, gravitational waves can be guided, enhanced and weakened, which is different from gravity, gravity can penetrate any medium, gravity can not be guided, these are the most cutting-edge disciplines in our country, there are no experiments to confirm, the experimental equipment is very expensive, and it will not be able to catch up with developed countries in theoretical physics experiments within 50 years!

Reason: According to Maxwell's equations, a changing electric field produces a magnetic field. Motion is a change, so the electric field of motion produces a magnetic field.

There is an electric field in the space around the charge, and the motion of the charge causes the electric field to move, so the moving charge produces a magnetic field. Electric current is the flow of electric charges, so the electric current creates a magnetic field. A constant magnetic field is generated around a constant current.

Since the magnetism of a magnet is the same as the current, the current is the movement of an electric charge, so in a nutshell, the magnetic field is generated by the change of the moving charge or electric field. From the point of view of modern physics, the only ultimate components of matter that can form an electric charge are electrons (with a unit negative charge) and protons (with a unit of positive charge).

The electric field is similar to the gravitational field, and the basic characteristic of the electric field is that it has a strong effect on the charge placed in it, indicating that the electric field force is similar to the gravitational force The amount of electric charge is similar to the mass of the object, then it can be seen from the analysis of g=mg, f=qe, that the gravitational acceleration g is analogous to the electric field strength e in the electric field, and the direction is vertical downward

The ratio of the gravitational potential energy of an object to its mass can be defined as the gravitational potential in a gravitational field If the gravitational potential energy of an object on the ground is zero, then the gravitational potential energy at a height h above the ground is: mgh, then the expression for the gravitational potential is:

mghmgh so the answer is: g; Straight down, gh

Hello. Although this question is the original sentence of the textbook, it is not easy to explain.

Because for a long time, there has been no strict definition of "what a substance is".

Generally understood in a more literal way, "matter" is: "matter: that is, an object, and it is the real existence of the observable world; Quality: It means to make up a component. Therefore, the so-called 'matter' is.

The composition of an object that can be observed in the real world. ”

From this point of view, the field.

It has mass, it has energy, and it is a necessary part of the object – although an object is made of molecules (or paraatoms, generally referred to collectively as 'entities'), if there is no electric field, the entity.

It is impossible to stick together.

In this sense, the field is satisfied.

Substance. Definition.

So, the field is matter.

In a nutshell, it is usually said that substances contain. field" and.

Physical objects" two.

If you find it helpful, if you don't understand, please ask, thank you.

None of the electric fields are hypothetical magnetic fields are real but not matter gravitational fields are forces between two objects.

All are substances, and they have the properties of matter. According to Einstein's theory of relativity, energy is matter.

Scientifically speaking, we have shown that all kinds of fields, such as magnetic, electric, and gravitational fields, can be counted as matter.

In science, the definition of matter is extremely broad, and what is seen and invisible can be counted as matter, including the magnetic, electric and gravitational fields that we often talk about. So, let's focus on the gravitational field.

Gravitational field: It is a scientific theoretical model that describes the attraction of an object to another object in space by extending this process. According to the current theory, it is generally believed that the gravitational field is a kind of spatial bending effect produced by matter in a certain space, and the object in this created curved space shows a change in a state of motion in a specific right-angled space when it moves, thus showing the effect of gravitational force.

Gravitational force: As the name suggests, it is the gravitational force that we often talk about in life, and his full name is: gravitational interaction force.

We think gravity is very important because among the four forces, gravity was the first to be discovered and studied by human beings, and it is mainly displayed in the macroscopic and microscopic aspects, and there is very little, almost nothing. Gravitational force is present all the time around us, and it is also within the range of long-range forces. The most intuitive manifestation is the celestial bodies and planets in the sky that we rely on, and it just so happens that the movement of celestial bodies seems to be very Zheng Zao-type mysterious, in the more popular words nowadays, it is a very tall thing, so we usually think that it is very important.

In fact, the fundamental explanation of gravitational force is a disturbance behavior of matter in space-time, which has a very clear explanation in Einstein's general theory of relativity, although the range of space-time disturbance will be far and wide, but when each matter is a gravitational source alone, his effect distance is not infinite, but also has a certain distance limit.