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If a bell, to timesSpeed of soundFar from the point of origin, what phenomenon will we hear?
One second, it is 1 second away from the origin of the sound second, but we hear this event at the origin, it takes another second, so we find that in the local clock seconds, the distant clock announces 1 second, the local clock 3 seconds, and the distant clock announces 2 seconds, that is, when we ignore the measurement time, we mistakenly think that the distant clock is slow. And the faster it is, the slower the bell becomes.
Suppose there is a ruler with a length of 1 sound second, and we have an infinitely long ruler fixed on the ground, and there is a detection device at the head and tail of the moving ruler, when it is detected to coincide with a certain ruler scale on the ground, the scale is reported by sound, and we receive the sound at the origin of the ground ruler.
When the ruler tail reports 0 seconds, the ruler head is already 1 second away from us, and this distance will not be received until 1 second later; When the end of the ruler is 1 sound second distance, and the ruler head is 2 sound seconds, it is still 1 second after we receive the end of the ruler to report 1 sound second, and we can receive the ruler head report 2 sound seconds, <>
So we intuitively think that the end of the ruler comes to the scale first, and the ruler reaches the scale that it should have reached immediately, and it feels as if the ruler that is far away has been shortened. And the faster you move, the shorter it feels.
When we exceed the speed of sound, we will catch up with the sound that the clock made before, that is, we will first hear the bell strike 3 times, report 3 o'clock, then hear the bell strike 2 times, report 2 o'clock, and then hear the bell strike 1 o'clock and report 1 o'clock, which is the phenomenon of time reversal over the speed of sound!
The phenomenon of slow clocks, shrinkage of rulers, and the phenomenon of reversing the speed of light in time can all be made with sound experiments, which can only prove Einstein.
He ignores the problem of measuring velocity and treats phenomena as physical essences.
Explain it as it is in this articleTheory of Relativity, the twin son paradox, the son returns to the unborn father paradox, and the paradox of killing the father does not exist.
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The same distance is reported at a distance of 1 second from the origin, and if it is heard at the origin, it also takes 1 second, because the speed of sound is 170 meters per second at normal temperature, which means that it is reported at 170 meters from the origin, and it takes 1 second to return to the origin.
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The speed is fast, it passes in a flash, and it is not easy to detect.
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For example, the speed of light is very fast, so time seems slow.
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There's a basis for that, and that's what the theory of relativity is.
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I think it can be reflected by flying.
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This thing is a kind of self-hypnosis of human beings.
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No, otherwise Einstein's theory of relativity would have been proven.
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There is not enough evidence to prove it.
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There should be none, otherwise there would have been research in this area.
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There should be no definite experimental proof of this.
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Many scientists are now trying to prove this idea.
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The results of mathematical derivation were then confirmed by experiments.
The faster the speed, the slower the time, the experiment is that the plane carries a cesium atomic clock around the earth and then compares it with the cesium atomic clock placed on the ground, and finally proves the time delay effect of special relativity. The stronger the gravitational pull, the slower the time proves that the experiment is gravitational redshift, and the spectral lines of the same element are closer to the red end on the white dwarf than on the Earth, indicating that in the region of the white dwarf with greater gravity, the photon vibration is slower, that is, the time is slower.
The mathematical proof is as follows: the background space-time of the special theory of relativity is a Min-type space-time, the line element ds 2=-dt 2+dx 2+dy 2+dz 2, take a standard clock, and the line element is ds 2=-d 2. The line element is invariant, and it is the same in the reference frame at infinity as it is in the reference frame of the standard clock, so -dt 2+dx 2+dy2+dz 2=-d2, and the standard clock is in uniform linear motion, and the velocity is v, then the Pythagorean theorem has dx 2+dy2+dz 2=v2dt 2, and the above equation is brought into the dt=d 1-v 2, because v is constant less than 1, so dt is greater than d, that is, the time lapse in the uniform motion reference frame slows down.
The background space-time of general relativity is curved space-time, for the sake of simplicity and generality, the static spherically symmetrical space-time is taken as the background space-time, and the line element is the Schwarzschild line element: ds 2=-(1-2m r)dt 2+(1-2m r), for the sake of simplicity, the origin of a circumferential coordinate system is taken around the standard clock ds 2=-dt 2 with a constant high and low angle of 90 degrees, and the velocity v is a uniform circular motion ds 2=-dt 2, and the line element is invariant, and the motion relation has r 2(d 2 + sin 2 d 2) = v 2dt 2( =2, sin =1,d =0)。 Let the two line elements be equal, and obtain dt=d 1-v 2-2m r), from this equation, it can be seen that the larger r is at infinity, the larger the intrinsic time d of the standard clock, that is, the greater the time rate, the faster the clock goes, and the larger r the gravitational force is, the smaller the gravitational force, the faster the time, that is, the stronger the gravitational force, the slower the time.
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Speed and time, space, and mass are related, not independent.
The faster the object moves, the slower the time, the greater the mass, and the smaller the space. Specifically, you can take a look at the basic information of the theory of relativity, which is not a profound theory, but is derived from the principle of the invariance of the speed of light and the Pythagorean theorem, which is known to elementary school students, and has been confirmed by countless scientific experiments. It is recommended that you go to the Internet and take a look at the basic information, and you will be able to understand it quickly.
If you don't study, you will think every day about why time will slow down because of the speed, and you can't figure it out if you want to break your head.
The absolute view of time and space is consistent with our daily life experience, but it has been proven wrong. It's just that we exercise in our daily life, whether we are running or taking the high-speed train, the speed is very low, and we can't feel the change of time at all.
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To put it simply, time and space do not exist, just an illusion.
Time is not continuous, it is the law of birth and death (now the scientific understanding of energy is far inferior to Nikolai's rotation theory, and the rotation theory is not exact, the essence of energy is to be born and destroyed, but the speed (every finger flick is 16 trillion times, TV only hundreds of times feels very real) is too fast, mistakenly thinking that energy is rotating).
The faster the speed, the less the number of birth and death, and the slower it is relative to other people (in fact, it does not exist, it is the first thought of birth and death that there are all things, and the world of each mind is different, and I am also talking to myself in my dreams), and when it is faster than the speed of birth and death, the past, present, and future appear at the same time.
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Well, this should involve the theory of relativity, and living in Newton's system means that it is a little difficult to understand, but to give you a paragraph may help you understand.
The law of velocity synthesis in classical mechanics actually relies on the following two assumptions: 1 The time interval between the occurrence of two events has nothing to do with the state of motion of the clock used to measure the time, 2 The spatial distance between the two points has nothing to do with the state of motion of the ruler used to measure the distance. Albert Einstein found that both assumptions had to be discarded if the principle of invariance of the speed of light was to be recognized as compatible with the principle of relativity.
At this time, for one clock is a simultaneous event, and for another clock it is not necessarily simultaneous, and simultaneity has a relativity. In two coordinate systems with relative motion, the values obtained by measuring the distance between two specific points are no longer equal. Distances are also relative.
If an event in the k coordinate system can be determined by three spatial coordinates x, y, z, and a temporal coordinate t, and the same event in the k coordinate system can be determined by x, y, z, and t, then Einstein found that x, y, z, and t can be found from x, y, z, and t by a set of equations. The relative velocity of motion and the speed of light c of the two coordinate systems are the only parameters of the equation. This equation was first obtained by Lorentz, so it is called the Lorentz transform.
It is easy to prove by using the Lorentz transform that the clock slows down because of its motion, that the ruler is shorter in motion than when it is at rest, and that the addition of the speeds satisfies a new law. The principle of relativity is also expressed as a definite mathematical condition, i.e., the space-time variable x with apostrophes under the Lorentz transform'、y'、z'、t'The space-time variables x, y, z, t will be replaced, and the expressions of any laws of nature will still take exactly the same form as before. What is known as the universal law of nature is covariant for the Lorentz transformation.
This is very important in our quest for universal laws of nature.
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The distance is certain, and the time and speed are inversely proportional.
For example: 200 meters from home to school, the speed of going at a time is 5 meters per minute, and the time is 40 minutes) will not be said!!
It's like dividing the dividend by divisor equals the quotient!
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Let's go and see Einstein's theory of relativity!
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Velocity is a vector quantity, which has both magnitude and direction.
**The change in velocity is considered in terms of the magnitude and direction of the velocity.
1. The object moves in a uniform circular motion, and the direction of velocity changes, and the velocity must change.
2. The object moves in a straight line, and the speed changes, and the speed must change.
3. The speed and direction change at the same time, and the speed must change.
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