What is the relationship between gravity and space time curvature?

Gravitational force and space-time bending are in a sense equivalent to the same concept, and gravity was discovered by Newton as one of the four fundamental forces. Leaving aside the truth or falsity of the story, Newton believed that the force of an apple ripe on the ground and the moon "floating" in the sky are forces of the same nature, that is, gravitational force. Newton also gave a formula for calculating gravity, which was first introduced in high school physics classes, where gravity is inversely proportional to the square of the distance between two objects, proportional to the product of the object, and multiplied by the gravitational constant.

But Newton did not explain gravity in essence, Newton believed that space-time is absolute, and gravity acts at a distance. How to understand this over-distance effect? Here's a simple example:

According to Newton's formula of universal gravitation, it can be seen that if the sun disappears instantly, then the earth will instantly lose the effect of gravity and leave its original orbit.

This kind of super-distance effect was Einstein's least favorable, because the speed of light is invariant and cannot be surpassed, and the current superluminal speed is only recognized as the speed of cosmic expansion and quantum entanglement. In 1915, Albert Einstein added gravity to his theory and proposed the general theory of relativity, the core of which is the curvature of space-time. Einstein essentially explained gravity because gravity is an outward manifestation of the curvature of space-time.

Because the existence of mass and energy will bend space-time, and matter will move in this curved space-time. The simple understanding is: how the mass high-speed space-time bends, and how the curved space-time high-speed mass moves.

Here we explain the relationship between gravity and the curvature of space-time, two different statements. The explanation of gravity in general relativity is closer to its essence, and the study of Mercury's precession problem with general relativity is closer to the actual measurement than Newton's law, but there are still errors.

It can be said that Einstein's theory of relativity proposes that almost all the formulas of Newton's laws have been corrected, and Newton's laws are applicable in low-speed worlds, but some results calculated with Newton's laws in high-speed worlds will show large errors. But the irreconcilability between relativity and quantum mechanics means that there are likely to be new theories to unify quantum mechanics and relativity, making the results less erroneous.

For the explanation of gravity, quantum mechanics also wants to intervene, we look at the more than 60 kinds of particles in the Standard Model of particle physics, including the basic composition of matter, but also contains the three basic forces of the exchange particles, what is missing? The graviton proposed in quantum mechanics hopes to explain gravity from another angle, but the mathematical process is too complicated and self-consistent, and the particle has not been actually discovered.

Therefore, at present, general relativity interprets gravitational force from the perspective of space-time curvature.

At present, general relativity interprets gravity from the perspective of space-time curvature, which is the most essential. The relationship between gravity and space-time curvature is actually an independent pair.

The essence of gravity is the curvature of space-time, and gravity and space-time curvature are not two separate entities, they are complementary to each other. In fact, the curvature of space-time creates a gravitational pull.

If space-time bends to increase or decrease gravity, then the original time value will also be changed by space-time bending, so this effect is particularly magical.

There is actually a lot of relationship between gravity and space-time curvature, because it is attractive, so space-time will bend, and under the influence of attraction, their relationship is attraction, which is still relatively attractive and able to control space-time.

Gravitational force and space-time curvature are parallel, and gravity also changes with space-time curvature. Then the two are indispensable, because there are too many of them in space.

Gravitational force is one of the four fundamental forces known in nature, Newton was the first to discover gravity, and later the theory of relativity redefined gravity. Gravity exists between all matter, from Newton's equations to Einstein's theory of relativity, and we are studying gravity more and more deeply. In Newton's gravitational formula, gravity is inversely proportional to the square of the distance between two objects, and Einstein proposed the theory of relativity, which is fundamentally different from Newton's view, and the essence of gravity in the theory of relativity is the curvature of space-time.

<> Newton's gravitational force, Newton was one of the greatest physicists and one of the greatest mathematicians, the founder of classical physics. Legend has it that Newton was hit by an apple while he was sleeping, and he wondered why the apple fell down instead of going up. This is how gravity was discovered, but limited to the development of the time, Newton believed that gravity applied to any object, and that the magnitude of gravity was only related to the mass and distance of the object.

Just like gluons, w and z bosons, and photons, they are the medium of strong side-finger noisy weak nuclear and electromagnetic forces, and people want to find the medium of gravity, and they are named gravitons.

Gravity is a very powerful force, it is everywhere in the universe, as small as a piece of masonry, as large as all the celestial bodies in the universe are not affected by gravity, and our earth can orbit the sun stably thanks to gravity. Whereas, gravitational force is extremely weak, the weakest of the four fundamental forces, and it can hardly compete with anything. The gravitational pull of the whole planet pulls our phones down and carries them down, but we can easily pick them up and even a one-year-old child can win the battle against gravity.

It's an interesting thing, what is gravity, this incredibly strong and incredibly weak force? What is its essence? The first person to give a precise definition of gravitation was Isaac Newton, whose law of gravitation brought humanity so close to the truth of gravitation for the first time.

Neither! Gravity is determined by the properties of matter, one is that matter has mass, and the other is that matter is moving, and matter 1 is energy. If the energy of an object or system is not uniform, then the energy always flows from a higher position to a lower position, and finally reaches equilibrium.

There are countless particles distributed in a system, assuming that the energy state of each particle is the same, but they must have a common center of mass, and each particle and the center of mass have a vertical distance, then the particle and the center of mass have a relative potential energy difference, relative to the particle point, the potential energy near the center of mass is zero, so this particle needs to release potential energy, the direction of the center of mass, this is the gravitational force, which conforms to the principle that the energy of matter always flows from a higher position to a lower position.

To summarize, gravity is produced by the difference in potential energy of an object due to distance!

Don't guess, gravity is the simplest frictional effect of action and reaction force, and there are no four major mechanics, the fundamental force is the effect of frictional collision force! The formation of the form of matter also requires a certain amount of pressure, which is also a kind of friction, as well as elastic deformation (elastic force), which is related to pressure, and is also a special case of friction!

Why? Some people say that Newton first discovered gravity, wrong! Newton discovered gravity rather than gravity, first of all, to distinguish between the gravitational effect of celestial bodies forming spheres and the rapid nucleus attraction between celestial bodies, which is the recircular belt force and gravity, and secondly, gravity and gravity are two effects that are essentially the same but move in different ways.

Gravity is the force of the spherical range formed by the gravitational wave, and the gravitational force is the force of the disc-shaped range formed by the vortex gravitational wave, the gravity force is roughly vertically pointed to the center, and the gravitational force is around the center of the vortex, and there is still a big difference between them! Their fundamental effects are all torsional effects caused by the friction difference between the inner and outer diameters of the mucavity excavation of the object, which is essentially the same fundamental effect!

Finally, there is no space-time bending, and there is no graviton, just the most common friction collision that we can't do without all the time! The universe is simple, and the mediocrity is empty!

The essence of gravity is the curvature of space-time, and this is also the view of Einstein's generalized theory of relative violence, and this is also a view put forward to explain the idea of space-time when the bridge collapses, so what kind of force gravity is is still a mystery.

In fact, it is one of the four basic forces. Of course, it is curved, because the bending of space-time will produce gravity, which is the essence of gravity.

It should be an attractive force, it should be a graviton, mainly because of the interaction between the objects, which eventually produces a kind of attractive force.

I. Formulation of the problem.

The current theory is that gravitational bending and space-time bending are the same thing, and that light bends in the gravitational field, which is a bend caused by gravitational acceleration, which is called gravitational bending or space-time bending.

In fact, there is a difference between gravitational bending and space-time bending: gravitational bending means the result of gravitational acceleration, or the result of gravity causing unevenness in space-time; The curvature of space-time is the result of the superposition of space-time, which is not only related to the space-time where it is located, but also to the space-time of the quantum itself, which corresponds to the frequency of the quantum.

2. Analysis of the theoretical status quo.

1. Gravitational lensing effect theory: The gravitational lensing effect is due to the distortion of space-time near massive celestial bodies, which makes light bend when passing near massive celestial bodies. If there is a massive object in a straight line from the observer to the light source, the observer will see one or more images formed due to the bending of the light, a phenomenon known as gravitational lensing.

Theoretical analysis: The reason for the bending of light rays explained by the gravitational lensing effect theory is the distortion of the space-time, and the space-time of the photon itself is not considered, and the superposition result is not considered.

2. Black hole theory: In the universe, some massive celestial bodies will form a dense point after they collapse, and because its mass is very large, the gravitational force generated is also very large, so large that light cannot escape after entering, so a black hole is formed.

Theoretical analysis: The black hole theory only mentions the huge gravitational attraction of celestial bodies, without considering the characteristics of light itself, and the conclusion is that light cannot escape, which will cause quantum waves (including gravitational waves) to move at the speed of light cannot escape, so it will be concluded that black holes have no gravitational attraction and no external interaction. This is clearly not true.

3. The significance of space-time bending.

The space-time curvature should be the result of the superposition of the space-time of the quantum itself and the space-time in which it is located, and the space-time curvature of quanta of different frequencies is different after the superposition of the same space-time, and the space-time curvature is also different.

Fourth, the experiment confirmed.

In gravitational lensing observations, the imaging should be different when different frequencies are used. If this is the case, it means that the space-time curvature should be the result of the superposition of the space-time of the quantum itself and the space-time in which it is located, and the space-time curvature of quanta of different frequencies is different after the same space-time superposition.

Einstein's general theory of relativity tells us that space-time is an indivisible whole, so we must explain the relationship between "gravity" and space-time together with space-time, otherwise this view is incomplete.

Why is this simple idea the key to solving the problem? This is because, if the gravitational mass is exactly equal to the inertial mass, then we will see that the acceleration of all the electric particles near a point in space-time is the same. If we, as observers, also have such acceleration, then we use ourselves as a frame of reference and all particles have no acceleration, isn't this a localized inertial frame?

In my free-falling inertial frame, all the laws of physics are exactly the same as they are in the inertial frame. So I can write down the laws of physics in the inertial frame as they are. Then, in a coordinate system that resists gravity and does not do free fall, the laws of physics can be obtained by "translating" the laws of physics in the free-falling inertial frame.

From this, Einstein came up with the analogy of curved geometry. Take any surface, such as a sphere, and the surface is approximately flat near a point on the surface, and the smaller the "nearby" range, the flatter the geometry. The geometry of the entire curved surface is made up of a myriad of these flat geometric patches, a bit like a soccer ball, and the pentagons and hexagons on each piece of sewn soccer ball don't look so curved, if you make these little pieces of skin smaller, it's flatter.

Now, in the gravitational field, since there are local inertial frames near each space-time point, we can "stitch" countless local inertial frames into a curved space-time.

The inertial frame is indeed flat, because according to Einstein, in the inertial frame, the most critical thing is no longer the spatial distance, but the "space-time distance", which has some absolute meaning, if we convert from one inertial frame to another inertial frame in relatively uniform motion, this "space-time distance" does not change, but the spatial distance no longer has absolute significance. So, Einstein generalized curved space as curved space-time, and his field equations tell us that the curvature of space-time is related to energy as well as momentum.

It's easy to imagine curved surfaces because we can look directly at spheres, toruses, and so on in three-dimensional space. Of course, in mathematical theory, mathematicians can completely get rid of three-dimensional space to study surfaces, as long as the length measurement on the surface is given, the properties of the surface are determined. Similar to two-dimensional surfaces, we can imagine three-dimensional curved space, and we don't have to put three-dimensional curved space into four-dimensional space or higher-dimensional space.

Space bending, for a student with slightly better geometric ability, is not difficult to imagine. Finally, how to imagine a curved space of time? The time of bending is still imaginable, that is, at different points in space, the clock moves at different speeds.

Einstein's curved space-time is the modern theory of gravitation.