What is time and can we change its speed?

Time is at all. But just what is time?

Time — it's like air. We live in it and not even think about what it is and how to use it. However, it is a very complicated thing, which is the basis of everything. Not for nothing has the phrase ”space and time”. With space everything is clear — here it is. To work 10 kilometers on the car and the shop is 300 meters on foot. That's the only time in this way is very relative. But what is it all about and is it fair to say that time is infinite and it has always been? Can I touch time? Maybe it can be stopped or reversed? All these questions people often ask each other and themselves. Let's try to answer at least some of them.

What is time?

Usually, by the time we understand what is counted the hours of the clock and what we need. In this case, it is assumed that time is divided into past, present and future. With the first and the last is understandable, but is there now?

Any microscopic fraction of time, about which we will try to tell you how about the present will be past. It turns out that this, as such, does not exist. It is only what we used to call it, that is a very broad concept in the spirit of ”our days”. It may include periods from several months to several years and even thousands of years, if we say, for example, the existence of the Universe or the formation of our planet.

One definition of time says that that makes all events happen simultaneously.

However, many scientists still perceive time as a progression, in which the future becomes present and present — in the past, and this process is continuous. Even if it explodes , our time would not stop and will continue to exist. Just not for us.

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What makes the understanding of time

And time is the basis for understanding the dynamics. Just having the idea of time, we can talk about the events that evolve at a certain speed. After all, it is considered normal to ask when something happened and how long it lasted some phenomenon. It turns out that time is like space — these are the coordinates, but not the dots on the map when it was. The difference is only one. On the map you can walk anywhere, and time — in one direction only. It is this property of time is the main mystery over which scientists are fighting to build their hypothesis, the fiction.

Fiction often raise the topic of time, as a flight of fancy in this direction, impossible to stop.

People perceive time more or less the same as usual for us the clock is ticking with the same speed. However, this is true only for classical physics. a Quantum physics says the opposite and suggests that the system becomes active only at the moment when watching her. That is, in a way that quantum physics does not exclude the possibility of time reversed.

a Little humor from physics that explains something.

Theory of relativity of albert Einstein

At the time, albert Einstein showed to the world the theory of relativity, about which you may have heard. It completely changes the typical view of the time and look at it. According to this theory, the progression of time is not universal. If we talk quite simply, according to this theory the clock at different speeds depending on which arm they are worn.

If the owner of the watch will be in the unusual situation for him, for example, will move at the speed of light or be near a strong source of gravitational waves — for example, near a black hole — the time will go differently. In some situations, it may even stop altogether or turn back the clock.

Simply put, in this situation, the perception of familiar physical processes changing and people caught up in such a place can not only observe time, but move on it as in ordinary space — left, right, forward, backward and so on. That is, the relativity equalizes time and space, giving them the same properties.

the world's Greatest minds are struggling with the mystery of time, but they have not yet achieved.

is it Possible to travel in time

There is still the notion of T-symmetry, when the phenomena and values with which they are presented, do not depend on the scale of the coordinates, and if you change positive values to negative the curve becomes a mirror. In the theory of relativity, in spite of such difference from the familiar world, this rule is also retained.

Interestingly, in the debate about the possibility of time travel in the reverse direction interfere with thermodynamics, which says that everything in the world is seek out an organized system to chaos, i.e. entropy increases. This process can not turnback. That is, an exploding star cannot be ”glued” back, and the rotten sheet of iron to turn into a new one. Simply put, ”the ground you cannot turn back and lean it will not restore.”

If they did that, maybe we once could?

In the end, we can roughly say that the time for us it is the time that is on the Earth. If we begin to travel in space on nearby planets, we have to understand what time is and how it is changing. Although, formally, to a minor fraction of a second of deviation is on the Ground. It even takes into account when some of the ultra-precision systems and atomic clocks.

do we Understand time

In General, mankind doesn't understand what time really is and all this is just theories and hypotheses. We still have not been able to reach sources of gravitational waves, though .

Until about the time we know only that it is a geometric parameter characterizing the duration of the process. It is part of the space-time continuum and the fourth axis is familiar to us three-dimensional world. Oh yeah... also the fact that it's damn interesting and strange thing. As we say — did not understand, but very interesting.