Since its birth, the universe has been constantly moving and changing. Over time, the universe has evolved step by step into the colorful world today.
But I don’t know if you have discovered that the changes in everything always tend to be confused spontaneously, rather than becoming more orderly, always moving from order to disorder. This process is reflected in the time arrow .
Why does the time arrow have such characteristics? Why do everything always go into disorder?
For example, a magnificent building will always collapse after a long period of baptism without people's maintenance. A collapsed building will not spontaneously return to its original magnificent appearance.
Theoretically, when the collapsed building is blown by the wind, every atom in the building may be blown to its original position, so that the original magnificent building can be reproduced.
But this possibility only exists in theory and is actually impossible to happen.
To put it bluntly, it is easy to go from order to disorder, but it will be difficult to go from disorder to order. Without human intervention, everything always spontaneously moves from order to disorder.
This is the famous entropy increase principle .
entropy is a physical quantity that measures the order of all things. The higher the entropy, the more disordered it is. The lower the entropy, the more orderly it is. Since the Big Bang in , everything has begun to move towards high entropy, that is, to chaos.
There is also the most common example in life, which may be less rigorous but more vivid. If you don’t clean the room for a few days, the room will become very messy, and in professional terms it will become disorderly.
And the process of cleaning the room is a process of disorderly moving to orderly. You may question: Didn’t you say that everything always tends to be disordered?
is indeed correct. Everything will always spontaneously become disordered. In the process of cleaning the room, it is indeed a process from disorder to order, but in this process, energy will definitely be released, causing greater disorder in the surrounding environment.
This is why, in an isolated system, entropy always increases.
In a certain local or period of time, humans can indeed create an orderly environment with their own wisdom. For example, everything we see now is almost a product of disorder to order: cars, tall buildings, and the mobile phones, computers, etc. we use every day.
But humans can't escape the ruthless "entropy increase principle". In the long river of history, human beings are simply unable to compete with the process of the universe moving from order to disorder.
In the extremely distant future, everything will go to complete disorder, and it also announces the death of the universe. This is the basic law of nature. Just as everything will go to death, it is destined to be inevitable!
