Who can answer the theory of relativity in detail? Can anyone explain the theory of relativity in la

The theory of relativity is a basic theory about space-time and gravity, mainly founded by Albert Einstein, and is divided into special relativity (special relativity) and general relativity (general relativity). The basic assumptions of the theory of relativity are the principle of invariance of the speed of light, the principle of relativity, and the principle of equivalence. The theory of relativity and quantum mechanics are the two fundamental pillars of modern physics.

Classical mechanics, which laid the foundation of classical physics, is not suitable for objects moving at high speed and in the microscopic field. The theory of relativity solves the problem of high-speed motion; Quantum mechanics solves problems under microscopic subatomic conditions. 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".

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Let's talk about relativity, Dirac: The theory of relativity.

Relativity, an electrodynamics tutorial.

That is, all physical rates should be the same for anyone.

The theory of relativity is Einstein's modification of the definition of time: the clocks of other reference frames seen by one frame of reference, transmitted by light, show the time as the time of that frame of reference. (See "On the Dynamics of Electric-based Nucleus Shirts in Moving Bodies").

and assume that the velocity of light in any frame of reference is constant; The laws of physics are similar in any frame of reference and can be fitted with coefficients.

It is derived under these three conditions.

However, in a homogeneous and stable medium, the velocity of any wave does not change, so in this case, there is a relativistic effect of any Wave tremor. The conclusion of the relativistic theory of light is also wrong when the medium changes. See Universal Theory of Relativity.

The theory of relativity is a philosophical idea that holds that everything is relative. If you are not tall, you are short, if you are not big, you are small, if you are not fast, you are slow, and if you are not long, you are short. A piece of paper has two sides, and if you don't have the front, you lose the back.

Applying this philosophical idea to physics is relativistic physics.

Relativistic physics and classical physics differ in their analytical perspectives in the description of physical phenomena. Classical physics also has the principle of relativity, but relativity in classical physics is absolute. And the relativity of relativistic physics is itself relativistic.

For example, the superposition of velocities: in classical physics, velocities are relative, and simple vector superposition and decomposition can be carried out. In relativistic physics, velocity cannot simply be superimposed or decomposed.

Because velocity is an expression of the rate of change of the relative distance between two objects, it is only related to two objects and not to other objects.

Suppose, in classical physics, a person on a train plays a table tennis ball, and he sees that the speed of the table tennis ball is 15 meters per second, and the speed of the train is 20 meters per second, then the person on the ground thinks that the relative velocity between the ground and the ball is 35 meters. (Exceptions when the direction is exactly the same).

However, in relativistic physics, it is not possible to add or subtract in this way, because the time system used by people on the ground is not the same as the time system used by people on trains. If expressed in terms of train seconds and ground seconds, respectively, 15 meters of train seconds ≠ 15 meters of ground seconds, so they cannot be added directly to 20 meters of ground seconds. This is a kinematic difference.

For electricity, it is clear that the directional movement of the charge forms the current, so is the current gone if the observer moves at the same speed as the electron?

For mass, kinetic energy is related to velocity, so an object moving at high speed will have kinetic energy, but if the observer follows the object with the same velocity, where does the kinetic energy of that object go?

We cannot find an absolutely stationary frame of reference in the universe, so all measurements can only be relative measurements. Relativistic physics is a system of physical theories that study how to obtain real measurement results under relativity conditions, as well as the expression and interpretation of laws in the physical sense.

The new four-dimensional coordinate system based on the Lorentz transform is by no means philosophical.

You see the car moving. And you are still. But in reality you and the car are moving. After all, the Earth is rotating.