Why do physicists believe that the laws of physics on Earth can be extended to the cosmic scale?

The reason for believing is that there is currently no evidence that can be questioned, and this is basically the case, and the other answers are in front of you. However, my first reaction when I saw the title was "A Fire Upon the Deep", and no one mentioned the answer after reading it, so I used the question to promote it.

The basic brain hole of this science fiction book by Verno Vinci is the questioner's sentence Can you imagine that the physical laws of a planet are different from those of the earth. In this space opera, the galaxy is divided into four levels, from the so-called unthinking depths at the core, to the slow zone where the earth is located, to beyond the speed of light, to the transcendent transcendence, where superhumans live in the outermost layer, the laws of physics are different. Nominated for the Nebula Award in '92, Best Feature at the Hugo Award in '93.

The quality of the translation is acceptable, and you should read it.

The belief that the laws of physics on Earth apply to the rest of the universe is not just a belief, it is also the conclusion of theoretical derivation and experimental observations.

The raison d'être of the universe is the same, and the logic is the same.

With the development of science, scientists have gradually discovered that the heavens and the earth follow the same physical laws.

Because our earth is a microcosm of the vast universe, which scientists deduce through computational observations.

Because there are no theories that can affect their physical laws at the moment.

This is also an inference that scientists have confirmed.

Because there is still a certain pattern in this relative.

It is because of the idea of symmetry, that is, the invariance in change.

The most important laws of physics are now based on symmetry, such as the symmetry of space translation for the conservation of momentum, the symmetry of time for the translation of energy and the symmetry of rotation in space for the conservation of angular momentum. The question is actually asking whether the translational symmetry of space and the rotational symmetry of space can be broken in the far reaches of outer space, and the other respondent asks whether the laws of physics are related to time, which is actually the symmetry of time translation.

Because we have observed that these symmetries are absolutely true on Earth, and because we have also found in astronomical observations that many of the laws in distant outer space are consistent with those near Earth, such as the planets still orbiting stars, we are more inclined to believe that this symmetry can extend all the way to the entire universe. Although it can also be assumed that the universe is only very limited, and that observations elsewhere are falsified by certain methods and happen to agree with theories, scientists always believe in the most natural one when there are multiple explanations, unless other evidence can be found.

Categories: Science & Engineering.

Problem description: 1 Why does the earth spit magma? 2. Why do rivers wash down houses? 3. Why does snorting cause avalanches? 4. How do tornadoes form? 5. Where does the starry sky come from and where does it go? Where is the Earth in the universe? Why does the sunset have a red glow?

Analysis: The answer is as follows:

1. When the pressure is high in the thinner part of the earth's crust, magma will erupt.

2. The flow of water has a force on the blocker, and the carrying capacity of water is proportional to the square of the flow velocity.

3. Caused by sound vibration, the perennial dust and coarse snow are divided into many layers, one of which is very fragile.

4. The geographical problem is basically caused by the agitation of air masses.

5. Stephen Hawking, who is as famous as Newton and Einstein, devoted his life to this research, you can check his information, the answer I gave was produced in a cosmic **, and the universe is now in a young diffusion period.

6. The universe is infinite, so it's hard to say that the earth is in **, but you can say that the earth is somewhere in the galaxy.

7.The sunset is red because of the dispersion of the sun's rays, which is professionally called the difference in the air, and the last thing you see in the evening is the red light with the smallest refractive index.

On our earth, we human beings have been living for more than 5,000 years, and in this long process, we have made us human beings basically understand the laws of the earth very well through continuous adaptation and innovation. In fact, this is not necessarily, because every planet in the universe has its own physical laws, such as gravity, air, temperature, and so on.

In the universe such a large space, there are many planets, these planets are affected by different substances, they will be different in all aspects, just talk about gravity, our earth and our nearest Mars will also be different, and these gravity factors are also the physical laws of our survival, but also one of the factors of how high our human beings can jump, and there is the difference in air, which is also an important factor in our survival, oxygen in the air, There are all kinds of noble gases. <>

For example, Mars, which is closest to our earth, these two planets, logically speaking, they are about the same distance from the sun, and the various environments in them will be similar, and the creatures are the same, but not on our earth, such as our humans, animals, and plants, all exist, that is, these things that we have on the earth, so that there are so many creatures on the earth, and on the other hand, Mars will find that there are no creatures on that planet. <>

If the physical laws on our earth correspond to the universe, they are all the same, then every planet in our universe will have living things, not only the earth is too full of living things, but the fact is that every planet will have different rules of survival, because with these laws, we can make our planet compare with other planets, we have differences, and this is the advantage and peculiarity of our earth.

No, because there are a lot of matter and magnetic fields in the universe that we don't understand, and the physical laws of the earth are only derived on the basis of the existing matter on the earth, so they do not apply to the entire universe.

No, because the physical laws on Earth are created based on the Earth, and it is difficult to work in the face of a vast, more complex universe.

Unhappy. Because the physical laws on the earth are discovered according to the conditions of the earth. It doesn't fit the whole universe.

Tsung-Dao Lee is a world-famous theoretical physicist, and in 1957, at the age of 31, Tsung-Dao Lee and Yang Zhenning climbed the Nobel Prize podium together for his discovery of the non-conservation of cosmic symmetry under weak interactions.

Someone asked Lee what impressed him the most when he was first introduced to physics when he was a student. Without hesitation, Lee Tsung-dao replied: "It was the universality of the laws of physics that deeply moved him.

The laws of physics are characterized by a simple formula that covers everything in the world, and the gravitational formula applies not only to the fall of apples, but also to the rotation of the moon around the earth, and to the interaction between huge galaxies. Maxwell used four simple equations to encompass all electromagnetic phenomena.

Physics is so beautiful that the laws of physics discovered by humans on Earth will be true not only on Earth, but also on the Moon, Mars, and other galaxies. There are lunar rovers on the moon and rovers on Mars, and they are designed and built based on the laws found on Earth. They are able to transmit signals to Earth, indicating that the laws of physics on the Moon and Mars are the same as on Earth.

Human beings have not exhausted all the laws in the universe, and there are still many problems in the universe that cannot be analyzed by the physical laws that human beings have mastered. This does not mean that the current physical laws are wrong, nor does it mean that the physical laws are not universal, but only that the physical laws have their own scope of application. For example, inside a black hole, what are the physical laws at the singularity?

Scientists don't know about the singularity at the moment, and they can't use current physics to analyze the singularity. But scientists will work hard to find a way to solve this problem.

Newton established the building of classical mechanics. At the end of the nineteenth century and the beginning of the twentieth century, the edifice of classical mechanics encountered serious problems, and then the theory of relativity and quantum mechanics were established one after another. The establishment of the theory of relativity and quantum mechanics does not negate classical mechanics, but only gives the scope of application of classical mechanics.

In its scope of application, classical mechanics is still universal.

The physical system is not applicable to any corner of the universe, and the modern physical system has its own scope of application, because human beings do not grasp all the laws of the universe, and there are still many problems in the universe that cannot be analyzed by the physical laws mastered by human beings.

No, human beings still know very little about the universe, and the physical systems established by scientists are only applicable on Earth, and many are not applicable outside of Earth.

No, the current physical system is not suitable for black holes in the face of dark matter.

There are many formulas or natural laws in the human world, which can explain some phenomena that occur in nature, but looking at the entire universe, some of the laws that human beings currently grasp may not be very applicable, at present, human beings have only lived on the earth for millions of years, and human beings have summed up some experience and laws only for thousands of years.

And there are indeed many things in the quotations that cannot be analyzed from a physical point of view, although many things on the earth are inseparable from physical thinking, but some of the physical knowledge we have learned so far, it is not necessarily 100% correct, there are some theories in the entire solar system, maybe you can use physical knowledge to explain it reluctantly, but what if it exceeds the solar system? Without the solar system, can the physics we have learned still explain some phenomena in the universe? Probably not.

For human beings, human beings are still very small in their grasp of the universe, and it is impossible for human beings to fly out of the galaxy to study things beyond the galaxy. Although the current level of science and technology of human beings is very developed, and they can observe the celestial bodies outside the Milky Way through astronomical telescopes, and polish the objects outside the Milky Way, the operation of all celestial bodies may not be solved with the physical knowledge of the earth, and as for how to solve some phenomena in the universe, human beings have no way to study a set of physical narratives applicable to the universe.

We can only wait until human beings develop slowly, and wait until human beings can finally fly out of the Milky Way or fly to a larger galaxy, and then we can study the corresponding rules, but some people think that at present, if human beings want to develop out of the Milky Way, it will take at least millions of years, because human beings can't even fly out of the solar system now, and can only launch probes.

Because the universe is very large, the physics mastered by human beings is the knowledge obtained by the laws of the motion of objects on the earth, which has its scope of application, and many phenomena in cosmology cannot be explained by physics.

There are many things in our daily life that can be explained by relevant theories, such as physical chemistry can perfectly use some formulas to solve some problems, but what will happen if these formulas leave the earth, in the whole universe, in fact, only the earth can use it now, and some of the knowledge we know at present can be reasonably explained as phenomena, but in the universe, if we use the knowledge we know every day to explain, it will definitely not make sense.

Insects it also says that it has mastered the physics of existence. But now do you believe that the physics it learns is useful?

Because some scientists believe that the rules we currently have are really just the surface of the rules.

Be. This can be explained in two ways:

1. The universe is the place where the earth is born, and it can also be described by the word "home". Therefore, it is not so much that the universe follows the laws of mechanics of the earth, but that the earth follows the laws of mechanics of the universe.

2. According to the general theory of relativity, any law of physics applies in any frame of reference. This sentence already tells us that the laws of mechanics are practical in a macroscopic frame of reference.