There is an ancient philosophical problem. It is a tree in the forest. If it falls down without seeing it, will it make a sound?
If you ask the question of quantum physicists, they may say that it was observed by this tree before it was observed.There is no existence, so the sound does not exist, because a large number of experiments show that the behavior of micro particles depends only on the existence of the observer, and the wave function collapses only when the observed moment.
That is to say, in the world of quantum, we can only determine the possibility of a certain thing in one or the other place, not not the possibility of one or the other, but not not, notIt may really be sure of its position, and this concept has troubled Einstein . At that time, he thought that if the moon did not exist when the moon was not seen, then quantum mechanics was too mysterious.
However, later experiments have proved that quantum mechanics is anti-intuitive, and then in the words of EinsteinNewton and Einsteins thoughts, whether it is aircraft, car, tennis, pebbles, or even a dust, they can predict their future status based on known physical laws, and even if we have the location and momentum of each particle in the entire universeThen we can accurately predict or return the universe every moment according to the law of physical law.
However, this beautiful imagination was broken by quantum mechanics
Physicists found that if you tryMeasure the location and momentum of the particles, the energy and life of the particles, the spin of the two vertical directions, the corner position and angular amount of the particles, and will find that we cannot get a precise solution , to be precise,We can know these two attributes at the same time, but the product of these attributes cannot be less than a basic value. This value is proportional to Plancks constant. In this way, we can only use probability to describe a micro particle at a certain moment may appear at a certain moment.Where, the accuracy of the entire physics does not exist in the quantum mechanics, leaving only the probability cloud.
However, even today, not all scientists believe that micro-particles cannot be predicted, such as one in quantum mechanics.The concept of strong> hidden variables , that is, there are still some rules we have not found in the quantum field. It is precisely because of the lack of these rules that we cannot predict the movement of micro -particles.
However, in terms of the current situation, uncertainty only exists at the level of sub-atomic particles, and in the entire macro world we are in contact withIn the entire universe observed by astronomers, the law of physics is still accurate. Whether it is Newtons gravity or Einsteins general theory, it can be used to predict celestial operation.
However, this situation is weird, because if the theory of the big bang is correct, then the universe was born 13.82 billion years ago.A explosion, time and space and material and all physical laws were born at that moment, but todays human civilization has two sets of theory of interpreting the universe.The most important thing is that they cannot be unified.
For example, quantum mechanics believes that gravity is derived from the exchange of gravity, but the general theory of relativity believes that gravity is the product of time and space distorted.Today, founding gravitationals, the general theory of general relativity is undoubtedly successful in gravity, but it is precisely because of this that physicists can only unify the strength of weakness into one theory at present.The unified theory of Stans dream of that year has not been realized today.
Overall
Whether it is relativity or quantum mechanics, they must not be the ultimate theory of the universe. Maybe the futureWith the emergence of higher energy -level collisions, we can find new particles and phenomena in the micro world.The theory is explained.
