Time is running water

Answer: QEEN - Born with Jinshi Level 6 6-15 15:59

There is no difference between time and space

Timing system

The timing system is a working system that determines and broadcasts precise times. Whenever the hour hits the hour, the radio that is listening to the broadcast will play a sound of "beep, beep...". People use this to calibrate the speed of their clocks. Where does the correct time on a radio station come from? It is controlled by the observatory's precise clock. So how does the observatory know these precise times? We know that the earth rotates evenly once a day, so the stars in the sky rise in the east and set in the west every day. If the earth is regarded as a big clock. The stars in the sky are like the numbers on a clock that represent the hours. The positions of the stars have been well measured by astronomers, which means that the numbers on the face of this natural clock are known very accurately. An astronomer's telescope is like the hands on a clock. On the clocks we use every day, the hands turn and the clock face does not move. Here, it seems that the hands "do not move" and the "clock face" is rotating. When the stars are aligned with the telescope, astronomers know the correct time and use this time to correct the observatory's clock. In this way, astronomers can know the correct time at any time from the observatory's clock face. Then at a certain time every day, for example, on the hour, it will be broadcast through the radio, so that we can calibrate our clocks or meet other work needs.

Astronomical time measurement relies on the rotation of the earth, and the unevenness of the rotation of the earth makes the time (universal time) accuracy obtained by astronomical methods only reach 10-9, which cannot meet the needs of society in the middle of the twentieth century. needs of all aspects of the economy. A more accurate and stable time standard emerged, which is the "atomic clock". At present, all countries in the world use atomic clocks to generate and maintain standard time, which is the "time reference". Then, time signals are delivered to users through various means and media, including: short wave, long wave, telephone network, Internet, satellite, etc. . This entire process is called "timing system".

The concept of time in the physical world

Zhi Xie

It discusses the concept of time in the physical world. Mainly methodological analysis.

------------------------------------------------ -------------------------------------

From describing the movement of the material world Change itself sets out to explore the concept of time in the material world, usually the scientific concept of time. This requires us to exclude our own experience and feelings from an objective perspective to examine time itself. In fact, while we are exploring, it is impossible to absolutely eliminate the sensory factors in our minds because we still have subjective feelings in our minds. logical judgment. The concept of time in the absolute material world requires us to block the concept of time in our minds, or we cannot use the word time to describe the concept of time itself in events.

However, time has been introduced into people's daily life as the most basic concept since ancient times. Even in science, the unit of time is one of the most basic units. From Newtonian mechanics to modern quantum theory and relativity, the empirical feeling of time has always been one of the most basic concepts indispensable in describing the movement and changes of matter. Although the concept of time in relativity theory is different from the concept of time in Newtonian mechanics. , but in terms of the way of judging the concept of time - time is the most basic concept, and there is no difference in its attributes.

The concept of time in Newtonian mechanics

In Newtonian mechanics, the relationship between time and physical quantities during the movement and change of matter is usually defined by the following two relationships:

S=νt

ν=αt

The former represents the relationship between the object’s distance, speed and time when the object moves at a certain speed. The latter represents the relationship between the object's movement speed, acceleration, and time during the process of the object changing its motion state. In the important equivalence relationship between the motion changes of the two objects above, s is the length of space, and its basic unit is meters. Now we define it as the basic unit in the International System of Units. Among the two equivalent relationships, there is another basic unit in the International System of Units, which is time. Usually we think that the basic unit in the International System of Units is the most basic unit for expressing physical quantities. We can define speed by the distance and time of object movement, but distance and time cannot be defined by ordinary changes in material motion. This is just because we regard it as one of the most basic quantities in physical relationships.

It is not difficult to see from the above that the definition of time in Newtonian mechanics is an agreement on the process of material movement and change. It can also be said to be an empirical agreement on human experience and feelings and external things. .

In this sense, it is an eternal thing. Based on this meaning, time has nothing to do with the process of material movement and change, and has nothing to do with the movement and change state of matter. In this sense, time is independent. Something other than the process of material movement and change, and the state of material movement and change. It has nothing to do with the state of existence of matter. (The same is true for space)

The concept of time in Newtonian mechanics is mainly reflected in the relationship between time and other physical quantities in the Newtonian mechanics system. Time is an unchanging quantity in Newtonian mechanics to determine the changes in material motion. The process of movement changes in space. On the one hand, time is an indispensable quantity in describing the movement and changes of matter; on the other hand, time itself has nothing to do with the movement and changes of matter. This is at least the characteristic of time in Newtonian mechanics.

The universal concept of time has been explained in the previous article. The concept of time is based on the concept of time in people's daily lives, based on the revolution of the earth, the autobiography of the earth, and the revolution of the moon. The concept of time is defined by the experience of year, month, day and hour. And use this as a reference to describe the motion changes of all substances.

As for time itself, we cannot get a satisfactory answer in Newtonian mechanics. The process of material movement and change is treated by time experience convention, which at least lacks a logical basis. I say this not to oppose empirical conventions in the process of material movement and change, nor to object to such conventions regarding time. Rather, I believe that this convention, without logical argument, depends on whether the concept of time is universally applicable. When it is unclear how to describe the entire material world, extending the concept of time to describe all the material world is at least an expansion of the concept of time. Of course, this is not an error of Newtonian mechanics, but an empirical error when extending the description system of Newtonian mechanics to the scope of the overall material world. Mainly manifested in the process of changes in material movement.

As a convention of empirical facts, time is sufficient to solve the motion of macroscopic and low-speed objects, especially the motion changes of matter in a determined reference system. Some problems arise when converting values ??in different reference systems. On the one hand, as the basic unit of time, the description of material motion changes is not universal (mainly the relationship between time and the physical quantities of material motion changes). On the other hand, we introduce different inertial reference systems for different The time definition method (or the method used to describe different material motion states when dealing with different inertial reference systems) includes the positioning of material motion changes themselves in the description system. This problem was caused by people trying to solve the problem of the speed of light on the eve of the establishment of the theory of relativity a century ago.

The concept of time in the theory of relativity

Before discussing the concept of time in the theory of relativity, I must explain that since the concept of time in the theory of relativity cannot be separated from the concept of space and the movement of matter, time cannot be separated. It is impossible for the concept to be completely independent, so there must be some remaining issues. If you cannot accept this statement, I suggest that you also refer to the concept of space and the properties of matter. If you can accept this description method, you can browse along the order of my writing. Issues not covered in this article will be explained in other related articles.

Historically, the introduction of the concept of relativistic time was triggered by the problem of the speed of light and the transformation of Maxwell's equations in electromagnetic theory in different reference systems. Lorenz, Boncare, and Einstein made outstanding contributions to this. If you are interested in this, you can refer to "The Theory of Relativity" by W. Pauli, translated by Ling Dehong and Zhou Wansheng, Shanghai Science and Technology Press p1-27. This article only discusses issues related to time and does not discuss other issues.

The introduction of the concept of time in people's social life is to conveniently determine the description of events. In physics, we cannot escape this purpose, the quantification of events. In different reference systems, if we want to compare the instant of occurrence and the time measurement of the occurrence process of an event, we must first determine the simultaneity of the event, otherwise we will not be able to discuss the same event in two reference systems. A matter of time.

In daily life, we usually use a generalized reference system to correct time problems, that is: for things on the earth, we usually use the movement changes between celestial bodies, such as the relative movement between the sun and the earth. On the earth, events at different latitudes and geographical locations on the earth are usually corrected by introducing them into the place. Regarding the judgment of simultaneity, Mr. Einstein explained through the following events:

Suppose there is a very long train moving on the railway at a constant speed. People on a train usually use the train as a frame of reference to observe all events. Every time that happens on the railway line also happens at a specific place on the train, and exactly as we can define simultaneity with respect to the roadbed, we can also define simultaneity with respect to the train.

For two events that are simultaneous on the railway subgrade, it is a question of whether the two events that are simultaneous on the railway subgrade are also simultaneous on the train. For example, it is determined that lightning strikes two places at different positions on the railway embankment at the same time. However, on a train, we cannot obtain that lightning strikes two points on the embankment at the same time.

The basis for the determination is that the motion of the train causes the lightning flash to propagate to the observer's eyes differently from the observation on the surface. (Note: In Mr. Einstein’s consideration process, he used the midpoint of two points on the roadbed as the luminous point of the signal source. Observation at two points gives us an empirical feeling.)

Einstein Mr. Stein also concluded that each reference object (coordinate system) has its own special time; unless we make statements about time relative to that reference object, statements about events at a time cannot be made It just doesn't make sense.

(I am describing Mr. Einstein’s views here. For this part, you can refer to "A Brief Introduction to Special and General Relativity" A. Einstein, translated by Yang Runyin and revised by Hu Gang, Shanghai Science and Technology Press P21)

Based on the assumption that the speed of light propagating in the universe is a constant (usually described as 300,000 kilometers per second), time is different for different reference systems. The time conversion relationship between the two reference systems is

The time concept of relativity theory is actually inseparable from the movement of space and matter. It is not appropriate to explore the time concept of relativity theory in isolation. In my opinion, the concept of time in the theory of relativity only regulates the motion changes of matter through mathematical relationships. In theory, the basic concepts are unified in mathematical logic and have universal applicability.

I personally do not agree with this description method. Such a definition system of material movement changes does not conform to the logic of real material movement changes. Such a definition system is full of logical contradictions.

Basics of the definition of time

Let’s first look at the definition of time.

In daily life, we use one revolution of the earth around the sun as the unit of time, one revolution of the moon around the earth as the unit of month, and one revolution of the earth as the unit of day. Scientifically, in 1956 the International Committee of Weights and Measures defined the second as 1/31556925.9747 of the length of the positive tropical year at 12:00 on January 0, 1900. This time standard based on the Earth's revolution is called the *Ephemeris second. In 1967, the 13th International Conference on Weights and Measures adopted a time measurement system based on the internal radiation frequency of atoms, which became the first atomic time. According to the new regulations, "a second is the duration of 9,192,631,770 cycles of radiation corresponding to the transition between the two hyperfine energy levels of the ground state of the cesium-133 atom."

We can see that whether we define time in life or in science, we do not adopt a fixed frame of reference. Instead, a certain period of changes in the motion of an object is used as a scheme to define time. Our definition of time itself is not sure which reference system we use to measure the time we use now. We will not doubt that in different reference systems, the period of the earth's motion will change. The sun revolves around the earth once and the earth rotates around itself. No matter which frame of reference we are in, the earth still has to obey its own laws of motion. If we use the rotation and revolution of the earth around the sun as the definition of time, then there is no doubt that time is an unchanging constant.

As for the method of atomic timing, we cannot logically deny that the reference frame of the atomic clock is different, and the period of the internal activity of the atom may change. However, the change of the period of the internal activity of the atom is In the final analysis, there is a certain relationship between the changes in the reference frame where the atoms are located and the reference frame itself. Although time can be used as a solution to adjust the cycle of changes in material movement, there are other adjustment methods. The explanation based on time is just One of the ways to regulate physical relationships.

In Newtonian mechanics, time is the most basic unit and the most basic physical quantity. In principle, we cannot determine the structure of time through the logical relationship between physical quantities. In the theory of relativity, time is one of the important physical quantities that regulates the relationship between changes in the movement of matter and is also based on the convention that the speed of light is constant. From Einstein's explanation of time in different reference systems, it is not difficult to see that such an explanation cannot give time a new meaning, and the concept of event simultaneity is only based on an empirical feeling. For the physical world, if we are pursuing the movement and change of the material world itself, then we must exclude the experiential feelings given to us by external things and verify the movement and change of matter itself. In the description of the determination of the simultaneity of events in different reference systems proposed by Mr. Einstein, we can see that as long as we take the propagation speed of light and the speed of the train into consideration, then we can still get the results in different reference systems. In our frame of reference, the simultaneity of events has nothing to do with the frame of reference we are in or the frame of reference we choose. (You can refer to the properties of time)

In this way, there are two questions before us regarding the definition of time.

One is to define the purpose of time.

In Newtonian mechanics, time is used as a reference to measure the change process of material movement. Through the standard time unit we define, we can measure the change rules of material movement itself. The purpose of time is to describe the reference of material movement changes and to provide a measurement model of the standard process of event movement changes. At the same time, it is a basic physical quantity to describe the event process.

In Newtonian mechanics, the unit of time is indeed the smallest unit of a physical quantity that cannot be divided.

In the theory of relativity, the definition of time is not so simple. First of all, it is a method of mathematical relationship processing of the relationship between physical quantities in order to solve the assumption that the speed of light is transmitted as a constant in the universe. I personally think that the relativistic time concept is not satisfactory in explaining the movement and change of matter itself. In the process of describing changes in material motion, we cannot find any difference between the basic role and significance of the concept of time in the theory of relativity in describing the material world and the concept of time in Newtonian mechanics. If the definition of time is divorced from the universal reference that establishes the continuous process of material movement and change, then time as a material world has no meaning.

Another problem is the way to define time.

If we use the revolution of the earth around the sun, the rotation of the earth itself, or the revolution of the moon around the earth as the scheme for defining time, then, in this scheme, the subject we refer to is a certain change in the motion of the object. kind of period, it can be said that the standard we define is a non-inertial reference system. It uses the period of a certain movement or a certain process of the non-inertial reference system as the basis for time determination, and uses this to determine the process of material motion changes. What we actually do is to compare the change process of material movement with this standard event process. We usually describe the time process of material movement change in this way: how much time does it take for an object to go from A to B; From a certain state to a certain state, how long does it take to complete. How much time or how long it takes refers to the process of standard events we use. For example, the movement process of the hour hand, minute hand, and second hand of a clock, we give it the unit of time, and their continuous process is the attribute of time.

If we accept this definition method, then time only depends on the duration of the motion event of the standard we use, and does not depend on anything else or any reference standard we use (referring to the inertial reference system ) has nothing to do with it. In this way, time itself is a constant.

Let me talk about a different definition of time here - the definition of relativity. The method of defining time in the theory of relativity is associated with the frame of reference. A certain inertial reference system corresponds to a certain time standard. Such a definition scheme is tested by scientific experiments and is consistent with the empirical facts of the experiments. I think that traditional measurement methods cannot complete the test of the concept of time in the theory of relativity (you can see the measurement of time)

The time definition scheme in the theory of relativity is based on such a foundation, that is: based on the movement of light in the universe The propagation speed of is a constant. Objects that move relatively in different reference systems will have relative velocities, and there is a definite relationship between the relative velocity and the inertial system of the two objects themselves. According to the movement of conventional matter, the relationship between the two objects is The relative speed between objects obeys the principle of speed addition. The method of relativity theory is to deal with the relationship between time, space and the movement speed of matter through a specific relationship, so that the relative movement speed between objects cannot be greater than the speed of light (300,000 kilometers). per second)

There is another issue about the universality of variable time, which will not be explained in this article. You can see the measurement of time.

We establish the concept of time in order to more conveniently determine the movement and changes of events and determine the subject of things. Time plays a universal role in our system of describing the physical world. I personally believe that it is not advisable to change the properties of the concept of time just to change a certain mathematical relationship in the description system.

The concept of time

In 1990, he published "Towards Time Research" ("Philosophical Trends", Issue 3, 1990, reprinted in "Xinhua Digest", Issue 6, 1990, and later included in " "Reminiscing about Nature")

In 1991, he organized the translation of the special topic "Physical Philosophy of Time" in "Foreign Philosophical Issues of Natural Science" (China Social Sciences Press, 1991 edition), and wrote the introduction to the special topic "The Physics of Time" Studying Philosophy", translating Hawking's "The Arrow of Time" and ?apik's "Time in the Theory of Relativity: An Argument from Evolutionary Philosophy".

In 1991, he studied Bergson’s philosophy of time and wrote “Philosopher of Life—Bergson”.

In 1992, he published "The Present and Past Discussion of Zeno's Paradox" ("Philosophical Trends", Issue 12, 1992, later included in "Reminiscences of Nature").

In 1994, he published "A New Look at Time" (Eslite Reading, October 1994, Taipei) and "Natural Time and Humanistic Time" (Elite Reading, October 1994) ).

In 1996, "The Concept of Time" was published, tracing the history of the concept of time.

Answer: xzacdyx - Tongjinshi born seventh level 6-15 16:02

Definition of time:

When A completes the movement process m, B After completing the movement process n, we say that it took time m for B to complete the movement process n.

To give an example of this sentence, you can say:

When the earth (object A) rotates once (motion process m), our ship (object B) moves from Dalian Sailed to Busan, South Korea (movement process n).

At this time, we say that our ship sails from Dalian to Busan (m), and the length of time it takes is the earth's rotation once (n). Simply put, the movement process m takes time n.

It can be seen from this definition that time is generated when the movements of two objects are compared with each other, provided that they are simultaneous. The object that uses time can be chosen arbitrarily. For convenience, people are accustomed to find the movement of objects with regular motion as time, such as the earth, and the movement of atoms in modern physics.

Reference: Physics Bar

Answer: Da'an Qiji-Assistant Level 2 6-15 16:04

Zi said on the river, the deceased Such a man, never give up day and night! This clearly illustrates the meaning of time. Time is constantly passing away, but it is endless!

Only in the process of life can people feel the value of time, cherish it

Answer: yhtddd - Scholar Level 2 6-15 16:12

Take a clock and look at it carefully, and you will know what time is

Answer: SKY·· - Magician Level 4 6-15 16:18

Your answer Can you focus on the key points of the question?

I don’t know where the long article was copied from

Answer: lidong1988 - Probation Level 16-15 16:39

Simply speaking, time is a coordinate axis, a physical quantity that describes the state of an object

Answer: lilu293 - Probation Level 1 6-15 16:41

1, Scientific: One dimension. .

2. Persuasive: Time is life!

3. What do you think: Same as above.

4, Others: Nothing

Answer: gjd121 - Probation Level 6-15 16:43

Timing System

The timing system is a working system that determines and broadcasts precise times. Whenever the hour hits the hour, the radio that is listening to the broadcast will make a sound of "beep, beep...". People use this to calibrate the speed of their clocks. Where does the correct time on a radio station come from? It is controlled by the observatory's precise clock. So how does the observatory know these precise times? We know that the earth rotates evenly once a day, so the stars in the sky rise in the east and set in the west every day. If the earth is regarded as a big clock. The stars in the sky are like the numbers on a clock that represent the hours. The positions of the stars have been well measured by astronomers, which means that the numbers on the face of this natural clock are known very accurately. An astronomer's telescope is like the hands on a clock. On the clocks we use every day, the hands turn and the clock face does not move. Here, it seems that the hands "do not move" and the "clock face" is rotating. When the stars are aligned with the telescope, astronomers know the correct time and use this time to correct the observatory's clock. In this way, astronomers can know the correct time at any time from the observatory's clock face. Then at a certain time every day, for example, on the hour, it will be broadcast through the radio, so that we can calibrate our clocks or meet other work needs.

Astronomical time measurement relies on the rotation of the earth, and the unevenness of the rotation of the earth makes the time (universal time) accuracy obtained by astronomical methods only reach 10-9, which cannot meet the needs of society in the middle of the twentieth century. needs of all aspects of the economy. A more accurate and stable time standard emerged, which is the "atomic clock". At present, all countries in the world use atomic clocks to generate and maintain standard time, which is the "time reference". Then, time signals are delivered to users through various means and media, including: short wave, long wave, telephone network, Internet, satellite, etc. . This entire process is called "timing system".

The concept of time in the physical world

Zhi Xie

It discusses the concept of time in the physical world. Mainly methodological analysis.

------------------------------------------------ -------------------------------------

From describing the movement of the material world Change itself sets out to explore the concept of time in the material world, usually the scientific concept of time. This requires us to exclude our own experience and feelings from an objective perspective to examine time itself. In fact, while we are exploring, it is impossible to absolutely eliminate the sensory factors in our minds because we still have subjective feelings in our minds. logical judgment. The concept of time in the absolute material world requires us to block the concept of time in our minds, or we cannot use the word time to describe the concept of time itself in events.

However, time has been introduced into people's daily life as the most basic concept since ancient times. Even in science, the unit of time is one of the most basic units.

From Newtonian mechanics to modern quantum theory and relativity, the empirical feeling of time has always been one of the most basic concepts indispensable in describing the movement and changes of matter. Although the concept of time in relativity theory is different from the concept of time in Newtonian mechanics. , but in terms of the way of judging the concept of time - time is the most basic concept, and there is no difference in its attributes.

The concept of time in Newtonian mechanics

In Newtonian mechanics, the relationship between time and physical quantities during the movement and change of matter is usually defined by the following two relationships:

S=νt

ν=αt

The former represents the relationship between the object’s distance, speed and time when the object moves at a certain speed. The latter represents the relationship between the object's movement speed, acceleration, and time during the process of the object changing its motion state. In the important equivalence relationship between the motion changes of the two objects above, s is the length of space, and its basic unit is meters. Now we define it as the basic unit in the International System of Units. Among the two equivalent relationships, there is another basic unit in the International System of Units, which is time. Usually we think that the basic unit in the International System of Units is the most basic unit for expressing physical quantities. We can define speed by the distance and time of object movement, but distance and time cannot be defined by ordinary changes in material motion. This is just because we regard it as one of the most basic quantities in physical relationships.

It is not difficult to see from the above that the definition of time in Newtonian mechanics is an agreement on the process of material movement and change. It can also be said to be an empirical agreement on human experience and feelings and external things. . In this sense, it is an eternal thing. Based on this meaning, time has nothing to do with the process of material movement and change, and has nothing to do with the movement and change state of matter. In this sense, time is independent. Something other than the process of material movement and change, and the state of material movement and change. It has nothing to do with the state of existence of matter. (The same is true for space)

The concept of time in Newtonian mechanics is mainly reflected in the relationship between time and other physical quantities in the Newtonian mechanics system. Time is an unchanging quantity in Newtonian mechanics to determine the changes in the movement of matter. The process of movement changes in space. On the one hand, time is an indispensable quantity in describing the movement and changes of matter; on the other hand, time itself has nothing to do with the movement and changes of matter. This is at least the characteristic of time in Newtonian mechanics.

The universal concept of time has been explained in the previous article. The concept of time is based on the concept of time in people's daily lives, based on the revolution of the earth, the autobiography of the earth, and the revolution of the moon. The concept of time is defined by the experience of year, month, day and hour. And use this as a reference to describe the motion changes of all substances.

As for time itself, we cannot get a satisfactory answer in Newtonian mechanics. The process of material movement and change is treated according to time experience convention, which at least lacks a logical basis. I say this not to oppose empirical conventions in the process of material movement and change, nor to object to such conventions regarding time. Rather, I believe that this convention, without logical argument, depends on whether the concept of time is universally applicable. When it is unclear how to describe the entire material world, extending the concept of time to describe all the material world is at least an expansion of the concept of time. Of course, this is not an error of Newtonian mechanics, but an empirical error when extending the description system of Newtonian mechanics to the scope of the overall material world. Mainly manifested in the process of changes in material movement.

As a convention of empirical facts, time is sufficient to solve the motion of macroscopic and low-speed objects, especially the motion changes of matter in a determined reference system. Some problems arise when converting values ??in different reference systems. On the one hand, as the basic unit of time, the description of material motion changes is not universal (mainly the relationship between time and physical quantities of material motion changes). On the other hand, we introduce different inertial reference systems for different The time definition method (or the method used to describe different material motion states when dealing with different inertial reference systems) includes the positioning of material motion changes themselves in the description system. This problem was caused by people trying to solve the problem of the speed of light on the eve of the establishment of the theory of relativity a century ago.

The concept of time in the theory of relativity

Before discussing the concept of time in the theory of relativity, I must explain that since the concept of time in the theory of relativity cannot be separated from the concept of space and the movement of matter, time cannot be separated. It is impossible for the concept to be completely independent, so there must be some remaining issues. If you cannot accept this statement, I suggest that you also refer to the concept of space and the properties of matter. If you can accept this description method, you can browse in the order of my writing. Issues not covered in this article will be explained in other related articles.

Historically, the introduction of the concept of relativistic time was triggered by the problem of the speed of light and the transformation of Maxwell's equations in electromagnetic theory in different reference systems. Lorenz, Boncare, and Einstein made outstanding contributions to this. If you are interested in this, you can refer to "The Theory of Relativity" by W. Pauli, translated by Ling Dehong and Zhou Wansheng, Shanghai Science and Technology Press p1-27.

This article only discusses issues related to time and does not discuss other issues.

The introduction of the concept of time in people's social life is to conveniently determine the description of events. In physics, we cannot escape this purpose, the quantification of events. In different reference systems, if we want to compare the instant of occurrence and the time measurement of the occurrence process of an event, we must first determine the simultaneity of the event, otherwise we will not be able to discuss the same event in two reference systems. A matter of time.

In daily life, we usually use a generalized reference system to correct time problems, that is: for things on the earth, we usually use the movement changes between celestial bodies, such as the relative movement between the sun and the earth. On the earth, events at different latitudes and geographical locations on the earth are usually corrected by introducing them into the place.

Regarding the judgment of simultaneity, Mr. Einstein explained through the following events: