It is said that every film directed by Christopher Nolan has attracted much attention, he is extremely good at shooting subjects about "time and space", and his works are often particularly brain-burning. The same is true of this movie "Creed", and it is far more brain-burning than the previous "Interstellar" and "Inception". Similarly, the film "Creed" also adds a lot of "scientific theories", and also makes some strange settings, which make the vast majority of the audience stunned. In this article, we will talk about the basic physics concepts in "Creed".
First of all, in the movie "Creed", there are two time expressions, namely positive time and reverse time. So if we want to figure out the positive and negative directions, we have to figure out what time is.
Among the hundred families of the Chinese pre-Qin Dynasty, there was a person named Corpse Ling. He has a book called "Corpse", in which there is a passage that says: "The Four Directions of the Upper and Lower Heavens are known as the Universe, and the Ancient and Modern Dynasties are known as the Universe." Translated, the "universe" of the universe represents space, and the "universe" of the universe represents time. Thus, the universe is a collection of space and time.
Today's view of the "universe" is actually very close to the expression in "Corpse". Specifically, the universe is the unity of all time, space, and the contents it contains.
This is really just telling us that the universe we live in contains time, but it is still impossible to say clearly "What is time specifically?" ”。 Objectively speaking, we may not be able to describe the nature of time with accurate predictions, that is, it is difficult for us to directly define time. But this does not mean that there is no way, the ancients have actually provided us with a way: the measurement definition.
We can imagine that the ancients did not have watches, so how did they look at time?
The answer is: heaven. The ancients looked up at the starry sky, and they found that some stars were almost motionless, they were fixed in the sky, and only the two and five elements were in motion, that is, the sun, the moon, Venus, Jupiter, Mercury, Mars, and Saturn were in motion.
Therefore, they used the immovable star body to refer to the coordinates and phenomena them into some patterns, for example, Mesopotamia imagined as twelve constellations, while the ancients of our country were four elephants and twenty-eight houses.
They proposed that the moon orbiting the celestial sphere was one month, and that the sun's orbit around the celestial sphere at the same time of the day was one year. Therefore, the ancients looked at time from the motion of celestial bodies.
Nowadays, although we have watches, no matter what the timing tool is, it is essentially the use of "movement" to measure time. So, from the point of view of the measurement definition, the essence of time is motion.
In fact, let's imagine that if all the matter in the universe stops moving, then time loses its meaning, that is, time stands still.
Now that we have figured out the time, let's talk about it again: the direction of time.
Objectively speaking, "Does time need a direction" or "Does time have a direction?" "It's not entirely clear at the moment, and it's basically hit the groundwork of physics." However, there is actually a saying that the direction of time is the direction of entropy. So what does this mean?
The "entropy" here represents the degree of chaos of an isolated closed system. Let's take an example, if there is a cabin, if you don't clean it up, it will get more and more chaotic. If you want it to be less chaotic, you need to clean up the room, and you need to put in the energy.
Scientists have found that this is the case with everything in the world, always shifting towards a more chaotic level, that is, increasing entropy. Scientists have found that increased entropy is an inevitable trend of isolated closed systems.
And time seems to be single-minded, just as entropy always increases. Therefore, some scientists speculate that the direction of time is related to the increase in entropy. Nolan also uses this phrase in the film.
Therefore, to reverse time, it is actually necessary to go in the opposite direction of entropy increase, that is, the direction of decreasing entropy. At this time, since the nature of time is movement, Nolan sets the reversal of time that all movements are opposite to those who are positive to time, which include movement, breathing, explosions, and so on. So, there are scenes of strange reverse movements that we see in movies.
However, the claim that "the direction of time is the direction of entropy increase" is controversial. This claim holds on the condition that the universe is an isolated closed system. Today's research, however, is finding that the universe is not a closed system. Therefore, the statement that "the direction of time is the direction of entropy increase" is not the mainstream recognition of the scientific community, but only a hypothesis.