What is time?

Time is controlling our life and nature Many say time is like a river. Again, many say time is money. What is time? The answer to this small question is very complicated. Maybe we don't know the answer. We can draw a very familiar explanation of time from the experience of everyday life, but it may not be at all possible for us to find out what the real time is. Scientists and researchers are constantly trying to understand the existence of time and space

The idea of ​​the earliest man is basically derived from the regular rotation of day and night. It takes about 24 hours to complete one complete rotation on the earth's own axis. That time is from sunrise one day to sunrise the next. During this time, the part of the earth facing the sun is day and the other part is night. Ancient people considered this regular change of nature as an ideal time value. Then came the time of measuring time with the sundial. How many hours a day is divided by the sun-dial device. The oscillation of the pendulum is divided into hours per minute and minutes per second according to the norm. This second is divided into the smallest unit using the vibrations of quartz crystals. This is how the modern clock is born. The clock would tell what time it is now. But no clock was able to tell what time itself?

In physics, time and motion are inseparable. For example, when two drivers A and B are going to cover a certain distance with two different speed motorbikes with a capacity of 10 and 20 kilometers per hour, respectively, driver B can cross the road in less time. Although the distance of the path is equal. In this case we say B takes less time than A. I say this because it takes less time, because our brain only compares between drivers A and B. This time, if a third driver C, whose motorbike speed is 30 kilometers per hour, takes part in this race, he will cross the path in less time. This time we will say that C took less time among the three drivers. Because now we are comparing between three different speeds. In the same way, if the earth rotates on its axis faster than normal, then day and night will change very fast. We will say that day and night are running out very fast. That means we have a kind of relative concept of time.

Sir Isaac Newton published the modern doctrine of Absolute Time & Space in the first book, Philosophia Naturalis Principia, published in 18. Which later brought about a groundbreaking change in the concept of time. Absolute time and space are real experiences that happen in our daily lives, which are also called objective reality. Newton referred to time as a constant value and said that the rate of change of time is the same everywhere all the time. According to this doctrine, the experience of time is the same for two different creatures located on two different planets. Even if everything in the universe is fixed and there is no flow of events, time will continue. According to Newton, it is impossible to match absolute time with any visible metaphor. It can only be explained by certain mathematical models.

Einstein's subsequent discovery of general relativity changed all old ideas about time. According to Einstein, the experience of time varies from person to person and is always variable from place to place. According to the theory of relativity, the higher the gravitational force in space, the slower it flows. Placing an atomic clock at different heights shows that there is a slight difference in time between them. This difference in time is called gravitational time dilation. “There is a deep relationship between speed and time through any zero, which we don’t usually realize,” he added. This means that our perception of time may vary depending on speed, direction and medium. Let's do a small test. Suppose a person is driving along the south side at a speed of 60 kilometers per hour. According to the laws of physics, in this condition the entire speed of the car is flowing along the south direction. After driving for a while, the car suddenly turned in a different direction to the south-west and started moving at the same speed per hour. If you notice the driver of the car, you will realize that it will take a little more time to cross the same distance than it used to take to cover a certain distance to the south. This is because the speed at which the car receives a southwest turn is basically a removed portion of the speed of the old road. So the speed will be comparatively less after walking on the new road. As a result, the progress of the car will continue to be slow.