"Three-million-year-old Lori, I always feel like this setting is a repetition of something." Li Ningfeng understands slowly, so he always gives people the illusion of strong receptivity.

Qingqiu blushed and quickly wrote in the air, "No. ”

Qiu Yu patted Qingqiu's head, "It's the principle of relativity caused by the speed of light, right?" ”

"Relativity?" It took Qiu Yan two seconds to recall, and then the same time to negate, "The word is correct, but the theory is wrong." ”

Qian smiled and shouted, "Hey, your denial, not to mention the collapse of the scientific foundation of a certain earth, at least it has cut off countless future development directions." ”

Qiu Yan looked at him strangely, "Isn't it a good thing to correct your mistakes before bringing disaster?" ”

Qiu Yu grabbed Qian Xiao's collar and pulled him away, "He just wants to get something from you in this way." ”

Qian smiled bitterly and said, "Master, don't take you like this, this is a pit teammate." ”

"Is that so......" Qiu Yan sighed lightly, "Intermediate civilizations are not supported by exchange items, after winning this game, the knowledge that other civilizations need thousands of years to accumulate will be given to you by the Destruction Game, so even if I don't say it, you can quickly get everything imaginable." ”

Qiu Yu said, "But before that, I still hope to understand everything about Qingqiu. ”

Qiu Yan nodded, and Qianqian's ten fingers danced rapidly in the void, as if creating an entire universe from scratch, one by one the stars rotated, colliding with the scenes of life and death, surrounding everyone.

"The essence of time is the value of spatial motion generated by the energy exchange between all things and the universe. Because the universe itself is in motion all the time, everything that exists in the universe produces macroscopic time in the passive movement of space. And because this time is a cosmic value, there is almost no possibility of reversal and stopping. But in addition to macroscopic time, individual objects also produce individual microscopic time due to their own additional movement in the universe. To a certain extent, micro-time can eliminate part of the influence of macro-time. ”

For example, after a person is born, he is destined to grow from small to large because of the time flow of macro time, and then grow old and die. However, if it is frozen, the energy exchange generated by cell movement is reduced, and the microscopic time of the individual is slowed down accordingly. Taking it a step further, if the microscopic particles of the cell or even the lower layers are completely stationary, and the energy exchange with the outside world is zero, then the microscopic time of the person is completely stationary. Of course. To bring an individual or a range of microscopic time to a complete halt, hundreds of millions of times more energy is required to counteract the torrent of macro-time, and no civilization would have such inefficient means of standing still in time unless necessary. ”

"What's that efficient means?" Although he knew that Qiu Yan would continue, Qian Xiao couldn't help but ask.

"In each universe, the value of space motion for energy exchange is capped at the speed of light, and not all motion can reach or approach the speed of light. This means that the closer you move to the speed of light, the closer you get to the stationary state of the entire universe. If you use a higher level of knowledge to explain, everything you see exists because of non-stop motion, so all the distance or size in space is the energy form of that level generated by the current motion at the corresponding velocity. For example, when you are stationary or moving at a low speed, the size of the Earth is the size you see, but when you get close to the speed of light, the low-level energy of the Earth itself will disappear from your observation, and only the energy exchange of the same level or higher level will remain, so the Earth will become quite miniature at this time. As you get closer to the speed of light, beyond more levels of energy exchange, the Earth will become smaller and smaller, becoming the size of a basketball, a ping-pong ball, or even an atom, and when you reach the speed of light, the Earth will disappear directly from your observations. ”

Qian Xiao subconsciously raised his hand and asked in a hoarse voice, "So approaching and reaching the speed of light is not because time has slowed down, but because ...... The distance gets shorter and disappears? Wouldn't it disappear because it reached the speed of light? ”

"The disappearance here is only an observation phenomenon corresponding to macroscopic time, and the observer itself still exists." Qiu Yu pressed his temples, "The effect of traveling with a starship, I'm afraid that the closer you get to the speed of light, the shorter the original distance in the universe will be, and when the speed of light is reached, the distance between the universes will disappear completely." For those who fly on a starship, it is almost as soon as it starts one second, and the next second it reaches its destination hundreds of millions of light-years away. ”

Seeing Qiu Yan's affirmation of Qiu Yu's words, Qian Xiao's heart moved, and he exclaimed, "Doesn't this mean that as long as you have a starship, the entire universe can gallop at will?" ”

Qiu Yu shook his head, "You used the starship to travel at the speed of light, just to make the starship disappear from the macroscopic time flow of the universe you observed through the microscopic time perspective because it reached the upper limit of energy exchange, but for the observer in the normal state, you still exist in the universe that he can see." In other words, if you have to travel a distance of one light year, then in the eyes of the whole universe, you have spent a year walking, and if you have to travel a distance of 100 million light years, then you have really spent 100 million years. ”

Qian Xiao twitched, "I found out that I had a starship phobia, if I wasn't careful, and set to fly for hundreds of millions of years, wouldn't it be too late to even cancel it, and I would become the last human in the blink of an eye?" ”

Qiu Yan held up a finger, "This kind of thing can't happen." The environment in the universe is changing all the time, and even a super-civilized computer can't calculate a safe route of tens of thousands of light-years, so if you really set a destination hundreds of millions of light-years away, you will definitely be knocked into cosmic dust halfway through, or you will be regarded as a windfall by a civilization that hunts starships for a living. ”

"Is the speed of light the upper limit of speed?" Money laughs and struggles.

"It's just the upper limit of natural speed."

"Is there really faster than light? What happens if you move faster than the speed of light? ”

"Beyond the speed of light is beyond the limits of motion in the universe. Your own time loses its meaning to the universe, and the result is that while you ignore distance, the universe ignores your movement. It can be understood as the effect of jumping or wormhole crossing that does not take any time. But this ignorance is only temporal, under the law of energy, it takes a lot of energy to move faster than the speed of light, and the amount of energy you can use determines the distance you jump. However, this is already the realm of advanced civilization, and there is no need to dig deep now. In short, after understanding the above, let's return to the question of Qingqiu. Fifteen years ago, she had returned to Earth from this place three million light-years away, in four days that seemed to her......"

Qiu Yu asked, "Wait a minute, how did these four days come about?" Isn't that starship flying at the speed of light? ”

"At the level of this civilization, it is only infinitely close, and it has not reached the speed of light for the time being." Qiu Yan's fingers slid quickly in the air, and a set of symbols flashed, "Through this formula, the ...... can be calculated"

Qiu Yu said a little reluctantly, "Can I count it myself?" ”

Qiu Yan smiled knowingly, "This is the speed formula." The reduced dynamic distance is equal to the speed of light minus the current speed of movement per second, divided by the speed of light and multiplied by the static distance. ”