The great philosopher St. Augustine (354-430 AD) was known for writing about his confusion about time in Confessions: "What is time? If no one asks me, I Very clear; but when someone asks me, I am ashamed." Not only does Augustine have this confusion, but until now, we are often asking: What is time?
What is "time"? "Time" is a physical quantity that can be observed or measured by a timepiece.
Time is the basic form of material existence and movement. It is characterized by endless uniformity, forever moving forward and never returning. Newton (British scientist 1642 - 1727 found that gravity, creating classic mechanics) once proposed the concept of "absolute time", he said: "absolute, real and mathematical time itself is passing, and because of its nature, evenly, Irrespective of any other external things, relative, apparent, and normal time are measured by motion. We usually use measures such as hours, months, and years instead of real time." Einstein (German scientist 1879-1955 proposed the special theory of relativity and general relativity) proposed a more comprehensive concept of "relative time". He pointed out that time cannot exist independently from the observers of the universe and its events. Time is the universe and its observers. One aspect of the connection. In short, the question "What is time?" is essentially the essence of exploring time. It also requires further research and long-term exploration by scientists. Fortunately, for the practical application of time, it is enough to understand the concept of “absolute time”. In special fields, it is sometimes necessary to add “relative time” correction to time.
