What is Time?
Time is something that everyone is familiar with 60 seconds is a minute, 60 minutes an hour, 24 hours a day, and so on. This is known as linear time and is something that everyone is familiar with and agree with. But consider this, if someone comes to you on the road and asks you to take time, what would you attract? You can drag the clock, or draw a calendar with x each day to represent the clock or time elapsed every second. But all this will be of those pictures, which are physical representations of the passage of time. Those pictures will scrape the surface of the puzzle of that time. Something that seemingly drives our lives and, inevitably, it cannot be explained by even the smartest people on Earth. So what is time and can we prove that time also exists? Aristotle once said, "Time is the most unknown of all unknown things." This was about 2,500 years ago, and it is still true today. If you go to Google and say "What's the time?" When you type in, you will find that it says that time is a dimension, and in many ways it is. When you text a friend and ask them to meet you for coffee, you won't give them a place without giving them time. However, there is a flaw in that definition of time; It closes a lot of doors - because time is also a measurement. For example, I was born in the 1990s. It was over 20 years ago, if I were to say that I was born 18 billion kilometers ago, it would make no sense and people would probably look at me like I'm crazy. With spatial dimensions - the 3D world in which we live - it is very easy to move back and forth between places because these things are essentially fixed in space. If I went to the store to buy groceries and I forgot the milk, I could easily go back and buy some milk. However, the time it takes to do so is unable to be recovered. It is lost in the past forever. An object placed in 3D space will remain there almost indefinitely. If I place the bottle on the table, it will remain there, but that bottle still falls prematurely. See, time is like an arrow - it moves in one direction; ahead. Scientists called fitting the arrow of time. If you woke up one day and found yourself swimming in the middle of an empty space, would you be able to tell which path is up, down, left, or right? Probably right there. However, the timing is very simple. See, the time comes from the past, originating in the Big Bang, where our history lies and is fixed. Through the present, where we are essentially prisoners, towards an unknown and turbulent future. We can remember things from the past like how can I tell you that this morning I went to the store, bought groceries, and then forgot to buy milk. But at the same time, I cannot tell you what I ate for breakfast next Thursday. The arrow of time originated in the Big Bang and has been advancing ever since. We used the second law of thermodynamics to illustrate this. This is known as entropy. Think of entropy as a remedy for disorder in the universe. In the Big Bang, all matter in the universe was narrowed into a single small dot. This is considered a very low entropy condition; A very systematic situation. It would be like filling every sock that was ever made in a drawer. In that case, you know with 100% certainty where your socks will be. Ever since the Big Bang, all matter in the universe has been moving away from each other, making the universe a high entropy system. Due to entropy and the arrows of time, we have galaxies, stars, planets, and even life. Entropy is the reason why you can tell the difference between past and future. This explains why every human is born and then lives and then dies - always in the same order. If there was no entropy - if there was no change in the universe, you would not be able to tell the difference between the year 2017 and the year 1 billion. No matter what you do, time moves forward and does not stop for anything or anything. At least on the macro scale. See, the arrow of time works and is noticeable on the massive skills that you and I work on every day. But at a quantum level, time operates differently. Take the position where you woke up in the middle of space. There, you have no idea which way is up, down, left, or right. This is a very unique situation that applies only to the vastness of empty space, but if you return to Earth, it is very easy for you to orient yourself What is Time? Geeks Talk.
At the macro level - big level, it is very easy for you to tell you that the year 1900 is different from the year 2018. It is very easy to see the flow of time. However, on a microscopic scale, if we look deeper into physics that the universe, entropy, and - later - the time is not so clear. If I would have recorded myself breaking an egg and putting it in a bowl and then I would have reversed the footage, you would have been able to easily tell that the footage was reversed. However, if I record a pendulum swinging back and forth for five minutes and then reverse the footage and show it to a random person on the street, will they be able to tell that the footage has been reversed? The answer is probably not. See that the arrow of time seems to be flowing in one direction on a larger scale, but as you take out parts of it and drag it down, the bare bones of the particles that make up the universe, every It takes time to work and flow in the direction; Both front and back. There are no laws of physics that state that the past is different from the future. The only reason why you can think about what you want for tomorrow's dinner is that what you want for tomorrow's dinner is the opposite of yesterday's arrow; Because of entropy, because the universe had a beginning. Or at least it seems. You can begin to see why the arrow of time and entropy is so important. They literally control our lives and the universe. Look at the fact that entropy is increasing, is well known. This is why life today is who it is. However, many people are not addressing the question: "Why was the penetration of the universe so low in the first place?" Well, the answer is simple. It was lower yesterday than today. You can take this argument back to the Big Bang. You hear that much, "The universe came into existence in the example of the Big Bang." And we all know that it is true by now. However, this may not be true. We have Einstein's physics of general relativity that allows us to return only for a few seconds after the Big Bang. But after that, our equations break down. As far as we can go ... for now. So far no law of physics suggests that there was no time before the Big Bang, and perhaps an inverted arrow of time. We do not yet have the science to look back yet. "The end of our universe", I discussed the situation that may occur in the distant, distant future. Because the universe is expanding and as the entropy continues to grow over time, eventually there will be a time where everything in the universe is so far away from each other that space will inevitably become empty. Everything would be too far below the atoms that make up everything in the universe to interact with each other. However, just as the outside temperature fluctuates from day to day, so does the entry of the universe. However, very small fluctuations are small time scales such as human life, on unreal time scales such as 10 to 10 to 56 years. Quantum fluctuations may cause an extremely random peak entropy decrease. This will create conditions similar to the Big Bang as we know it and can explain the arrows of time and the origin of our universe. However, to answer these questions, we need to unify quantum mechanics with Einstein's general relativity. This would provide a scientific link between the quantum world of atoms with the macro world of stars, galaxies, and black holes in the universe. It has been dubbed the "theory of everything" and is something that many scientists are working on right now. With this theory, we may be able at first - to be able to explain how and why the universe we live in came into existence. And may also prove that a multiverse exists
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