Alice vividly remembers that they rushed into the fog in a lifeboat and then met the wildlings on the island, for which Lady Larry was killed, and Paldick and the other sailors were eaten by the wildlings, only she and Anderson escaped.

She had told Aoki and Su Huilan all this, and there would be no problem, but how many days had passed? She had never counted accurately, it felt like days.

But she was suddenly unsure, and her memory suddenly became blurry, as if she had just had a dream.

Alice's face showed a look of pain, and she muttered to herself, "Why can't I remember exactly!" Why can't I remember! ”

Su Huilan, who was on the side, held her crumbling body and said, "That's because there is no standard sunrise and sunset on the island at all, and the length of day and night is unstable. Our brains only keep time according to their own biological clocks, and objective memory not only does not play a role in helping us recognize time, but rather confuses our brain's thinking. So when you don't think about it, you intuitively think that after a few days, you think about it, and you realize that you don't have time to remember at all, and your brain has decided that it's invalid information and thrown it into the information garbage. ”

Situ nodded, "That's right, so it's hard for us to estimate the exact time we will be on the island." I say that it took a few months because I simulated an atomic clock in my dream. ”

"Atomic clock?" Su Huilan said curiously, "Can you simulate the decay of microscopic particles in your dreams?" It's incredible! ”

"It's not that hard, you can do it, the only problem is that you have to understand the principle of the atomic clock, and know the resonance frequency of the atom you want to use at the energy level transition." Situ waved his hand lightly and said, "It just so happens that I participated in the design of the world's first cesium atomic clock and witnessed its success. ”

"The first cesium atomic clock was built at the end of the fifties of the last century, so aren't you ......?"

Su Huilan has been hesitant to ask Situ about the person in her dream, he is too similar to the person her father left in her dream, but he is too young, if according to her father, he was the best member of the younger generation of the alliance and the successor of Master Nan Ke, then it means that when Master Nan Ke was alive, he was already an excellent young man, and Master Nan Ke disappeared during World War II.

If Situ really participated in the design of the first cesium atomic clock, then the time would coincide, but she really couldn't imagine that the handsome man in front of her, who was suave and had the temperament of a superstar, was already seventy or eighty?

"That's right, atomic clocks of that era were so heavy that they needed a big house to fit, and they weren't easy to build." Situ did not deny or admit Su Huilan's words, "But if it is in a dream, it is much easier, and even the tools and steps used to cool or heat the cesium atom can be omitted, and there is no need for those lasers that lift the cesium atom and the sensor that captures it, everything is done by consciousness."

All we need is a suitable energy field, let the cesium atom pass through it repeatedly, and make a transition between two different energy levels, so that its resonance frequency reaches 9,192,631,770Hz, and such a conscious atomic clock is ready.

Atomic clocks are the most stable timekeepers. It was not until 1967 that the second was redefined as 9,192,631,770 times the period of the electromagnetic wave radiated by the transition between the two superfine energy orders of the ground state of the cesium-133 atom, which is equivalent to the second defined in the astronomical almanac, and the error of about one second occurs every 20 million years.

However, the environmental requirements for the atomic clock are too high, it requires the cesium atoms to be cooled to a static state close to absolute zero, and the whole energy level transition process is not allowed to interfere with magnetic fields, but in the real world, the universe is full of magnetic fields and rays. However, all this is different in dreams, the dream space is made up of the subconscious, which can block all distractions. ”

Aoki finally understood how Mo Yu felt when they heard Situ talk about the physics of mirrors catching light. He didn't know anything about what atomic clocks were, but after listening to Situ's explanation, he felt that it seemed like that, but he wanted to make one in his dreams, even with Aoki's spiritual power, he couldn't do it. Because the atomic clock is by no means as frivolous as Situ said, if he is not proficient in atomic physics and has personally participated in the design of the atomic clock, it is impossible to simulate such a thing. It's like if you want to simulate the effect of a nuclear bomb explosion in a dream, but if you want to simulate an atomic energy reactor, you can't simulate it without a professional.

Even he was puzzled when he heard it, and the others were even more confused, what mental power, dreams, consciousness, etc., were like a fantasy for Alice and the others.

Su Huilan was the only one among the people who could understand, but she still had doubts: "Mr. Situ, I still don't understand, the resonance frequency of cesium atoms is fixed in nature, but in dreams, everything is created only consciously, and the cesium atoms in your atomic clock are also created by your subconscious, so isn't its frequency also arbitrary?" And how can you be sure that the seconds you defined are correct? ”

Situ said: "The so-called vibrational frequency is actually the radiation generated when the energy level jumps, which is a kind of wave, and the wave can be captured by consciousness, and our spiritual power can interfere with each other, and our spiritual power also exists in the form of waves. I've felt the cesium atoms in the atomic clock pulsing at a steady frequency, so I can replicate the same pulse in my dreams. ”

"I didn't expect you to be able to unify things from the conscious world with things from the physical world so highly, and I've never tried to do that." Su Huilan listened with great admiration.

"It's not difficult, the combination of dreams and professionalism is what we often use. Engineers can use dreams to design drawings, physicists can use dreams to simulate the motion of celestial bodies, and in the era when there were no computers, those things that were difficult to visually display on the plane could be created through dreams, but it was more mentally demanding. A lot of geniuses I know have done this, and so can you. ”

Situ said and smiled at Su Huilan, "However, Professor Su is doing philosophical research, and he may not have much contact with physical simulation, but many philosophers in history have also used this method. For example, Kant tried to simulate God in a dream, but of course this dream failed, because in the dream he himself is God, and the world cannot tolerate the existence of two gods. In addition, he simulated the evolution of the solar system in his dreams, which was very successful this time, and thus proposed the nebula theory, which was written in his "General History of Nature and Celestial Theory". ”

Su Huilan had to admire Situ's erudition, this idea did inspire her, the subconscious mind can create the world, but it can't be separated from memory, but a madman like Kant wants to create God in a dream, which is not only whimsical, but also a kind of innovative wisdom and rebellious courage.

Of course, Su Huilan would not be easily led astray by Situ, so she returned the question to the atomic clock just now, and asked:

"But Mr. Situ, the time and reality of dreams are not unified. There is a Chinese idiom called 'Huangliang a dream', which tells the story of a person who has gone through a tortuous life, only to find out that he just had a dream, and when he woke up, the rice in the pot was not cooked. The length of time in a dream depends only on the speed of our brain's nerve signals, so how do you use the atomic clock in your dream to determine the time in the real world? ”

Situ smiled: "Don't you know the real dream? ”

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