A detailed analysis of the thinking experiment of 《 On electrodynamics of moving bodies》

The grand unified theory is coming.

“ Observers moving with the moving rod would thus find that the two clocks were not synchronous, while observers in the stationary system would declare the clocks to be synchronous.” ——§ 2. On the Relativity of Lengths and Timesi Static observers don't always claim that the two clocks are synchronized. When the distance of two clocks to the stationary observer is equal, the stationary observer will see that the two clocks are synchronous. When a clock is far away, it will arrive at the static observer later. Suppose that the static observer C, the moving observer An and B, only the light emitted by An and B at the moment of AC=BC reaches C, the static observer will find that the two clocks are synchronized. When AC > BC, the light of A clock is later than that of B clock, and vice versa. Einstein considered only one situation in the mind of the static observer, but in fact there were three. Observers of the movement saw that the reason why the two clocks were out of sync was due to the different distance of the two beams of light, not the time shown by the two clocks. Einstein ignored the problem of distance in the mind of the motion observer. In both static and dynamic systems, if the distance between the two observed points is not always equal to the observer (equal cases such as spherical or circular motion), it takes longer for the distant point to reach the observer. Other conditions are the same. At any same time, the two clocks must be synchronized, but the time it takes to reach the observer is different. The observer finds that the two clocks are different at the same time, and there will be the illusion that motion slows down the passage of time of the object itself. "When you place a clock at a point in space, an observer at point A can determine the time of events that are close to a point by finding the position of the clock that appears at the same time as these events. If you put a clock at point B of the room, we will add it,"this is the same clock that is placed at point A. Then, by the observer at point B, we can also find the time near the event at B. Without further provisions, however, it is impossible, compare the events of a with those of B in relation to time; So far we have only defined "time" and "B-time", but not "time" that is public for A and B. Only if we define the "time" that is needed by light from A to B as the "time" that is needed by light from B to A, can we define the public "time" of A and B. Set to "a time" Ta, send a ray from a to B, It is a t "B time", t'b From B to A is reflected, and at "one time" t'a returns to A. If ta-tb= t'a-t'b, then the two clocks are by definition synchronous. We assume that there is no contradiction in the definition of synchronization."ii That is, if the time from A to B is equal to that from B to A, then the time of A and B is synchronized. "We cannot give absolute importance to the concept of simultaneity; two events from a coordinate system are simultaneous, and from another coordinate system moving in relation to that coordinate system they can no longer be considered as simultaneous events." iii Simultaneity cannot be proved by tB-tA=t'A-t'B. Make the B clock do circular or spherical motion around the A clock, AB is in the reference frame of relative motion, according to Einstein's postulate of simultaneity AB at the same time; according to Einstein's conclusion, AB is different. In the principle of relativity, the exclusion of rotation is to eliminate this contradiction, and its essence is to exclude the situation of only relative motion but the same distance between them, and convert the reasons caused by different distances to time.

The principle of relativity is incorrect.