Hurry, hurry!! What is the main point and starting point of general relativity? Let s take a look

The landlord is definitely an elective physics appreciation ==

) is the breaking point of the relativistic trail cover.

a.Quality is what burns.

b.What is the length.

c.What is time.

d.What is force.

a.It's just stupid and true.

b.Mistake. Correct Answer: a

The original text is not in Chinese....The original text is too simple, you should look at the university physics textbook.

The general theory of relativity does not have a definite **, but several ** are gradually constructed together, among which the ** on the field equation was published in 1915, which marked the completion of the general relativity system. Therefore, 1915 is generally regarded as the year of the birth of general relativity.

The original ** of the special theory of relativity is "On the Electrodynamics of Moving Bodies", I have a word document, and I can send it to you if the landlord gives you an email.

I don't have a few articles on general relativity, sorry.

As the saying goes, "practice makes true knowledge", but I can tell you that neither special nor general relativity can be proved by practice. Humans want to get on a light-speed spaceship to verify the results of relativistic inferences such as the "Langevin effect". It's all impossible.

Because human beings have so far been unable to, and will never be, accelerate a macroscopic object to the speed of light. Therefore, any attempt by any person or organization to prove the theory of relativity through practice is doomed to bankruptcy.

At the same time, I can tell you in all seriousness that the relativistic effect does exist, and that it can only be deduced theoretically, not by scientific experiments. Because when a macroscopic object is accelerated to close to the speed of light, the mass of the object becomes close to infinity according to the relativistic effect, that is, it can no longer be accelerated. In other words:

It is impossible for a macroscopic object to reach the speed of light.

In other words, the study of the theory of relativity can only stay at the theoretical level, and cannot reveal its truth through experiments so that it can be revealed to the world. This is the emerging discipline of modern physics

the origin of theoretical physics; This is the fundamental reason why so many people have arrogantly questioned the theory of relativity, but scientists have never been able to respond to these doubts with real and strong evidence.

If we look at the reference frame with the initial velocity of the rocket being 0, the non-relativistic case is v, where v is ln(mo mo)*u; In the case of relativity, the sensation should be beta*gamma*c=v, then the answer is sqrt(v 2 (v 2+c 2))*c, where beta = velocity divided by the speed of light, gamma = 1 sqrt(1-beta 2), and c is the speed of light.

To put it simply, the "generalization" of general relativity is reflected in the fact that it extends "physical laws can be expressed in the same form" from the "inertial frame" described by the special theory of relativity to an "arbitrary frame of reference".

Specifically, the following:

Special Theory of Relativity].

To understand special relativity, we must first understand the two basic assumptions of special relativity:

1) The principle of relativity: all inertial frames are equivalent. The laws of physics are expressed in the same form for all inertial frames;

2) The principle of invariance of the speed of light: the speed of light in a vacuum is constant c in either direction with respect to any inertial frame, and has nothing to do with the motion of the light source.

The basic content of special relativity:

1) the Lorentz transformation of the space-time coordinates between inertial frames and their physical significance, which is a concentrated reflection of the relativistic view of space-time;

2) the covariance of physical laws, that is, physical laws can be expressed in the same form in any inertial frame;

3) The Maxwell's equations and the Lorentz force equations are tabled in covariant form, so that electrodynamics becomes an obvious relativistic theory for solving the problem of the interaction between charged particles and electromagnetic fields at any velocity.

The special relativity effect is evident for "microscopic, high-speed" particles.

General relativity].

Two basic principles:

1) Equivalence principle: all physical phenomena occurring in an inertial frame under the influence of a uniform constant gravitational field can be exactly the same as those in a non-inertial frame that is not affected by the gravitational field but moves with constant acceleration; (i.e. "gravitational force" is equivalent to "inertial force").

2) The principle of relativity of general relativity: All non-inertial frames and inertial frames present with gravitational fields are equivalent for describing physical phenomena. (i.e., physical laws have the same form in any frame of reference).

General relativity is based on the special theory of relativity, which holds that gravity is caused by distortion of space-time geometry, and that it is not a force in the traditional sense, but a space-time that is bent by matter and energy in space-time.

Special relativity and the law of gravitation are both special cases of general relativity, with the former being the absence of gravity and the latter being close, gravitational, and slow.

General relativity also states that "objects move along the shortest path in the geometry of space-time".

If there is no gravitational force in space-time, it moves in a straight line; If there is gravity in space-time that causes space-time distortion, it moves along a "geodesic" (great circle).

The theory of relativity is a basic theory about space-time and gravity, mainly founded by Albert Einstein, and is divided into special relativity and general relativity according to the different objects of study. The basic assumption of relativity is the principle of relativity, that is, the laws of physics have nothing to do with the choice of frame of reference.

The difference between special relativity and general relativity is that the former deals with the laws of physics between frames of reference (inertial frame of reference) that move in a uniform linear manner, while the latter generalizes to frames of reference with acceleration (non-inertial frames) and is widely used in gravitational fields under the assumption of the principle of equivalence. The theory of relativity has greatly changed mankind's "common-sense" concept of the universe and nature, and has put forward new concepts such as "simultaneous relativity", "four-dimensional space-time", and "curved space-time". It developed Newtonian mechanics and propelled physics to a new level.

The principle of special relativity is the two basic assumptions of the theory of relativity, and under the observation of the current experiments, the motion of objects is in good agreement with the theory of relativity, so it is generally believed that the theory of relativity is the correct theory.