Why can particles appear or disappear out of thin air?

I don't think particles are created out of thin air, they are created because of the aggregation of energy, and they disappear because the energy is lost.

Because particles and energy can be converted into each other, when the energy is large enough, ions can be produced, and particles disappear and become energy again.

Because particles have a very large amount of energy, they will be annihilated and converted into other substances in the process of colliding with each other.

Because it's light, not particles.

In the distant past, there wasn't enough time, so there were fewer large merger events, fewer gravitational collapse events, and member clusters were farther away than later. Protons and neutrinos are playing a game back and forth: protons try to combine with electrons to form neutrons and neutrinos, while neutrons and neutrinos try to go the other way and make protons and electrons.

It is also possible to combine protons and antineutrinos to form neutrons and positrons, and vice versa). In a matter of milliseconds (a long time in a fast-changing early universe), these reactions proceed at the same pace.

<>But as the energy drops and the temperature decreases, the small mass difference between protons and neutrons comes into play, and the reaction from protons to make protons is much easier than the reaction to make neutrons from protons...By the time the universe was a second or so old, the ratio of protons to neutrons had changed from 50 50 to nearly 85 15 in favor of protons.

Another way of thinking about it is that protons have a lower energy and are more conducive to the formation and storage of energy. The Great Theory of the Universe uses known laws of physics to construct an unusual model of the universe from the distant past, and then deduces it from the cosmic phenomena we see today, with great success. This is constantly expanding 、..

Not only has the cooled universe given birth to countless stars, galaxies, clusters of galaxies, and their large-scale structures over billions of years, but it also has the surprising property that every time we look deeper and farther into it, we see more and more ancient history**.

Learn about the structure of matter in the universe and how elementary particles are formed? When we look at distant galaxies and clusters of galaxies, we don't just see them moving away from us due to the cosmic Hubble expansion. And also to see what these objects looked like when the universe was young and not fully evolved.

This means a whole host of things, many of which have been empirically proven.

At a sufficiently high energy, two photons interact to form particles, and particles interact with each other, and the higher the temperature, the faster the formation.

For example, an atom is composed of a nucleus in the center and electrons on the outside, and the nucleus contains protons and neutrons.

Mainly because of the structure of matter in the universe, coupled with changes in energy and mass, all particles are eventually formed.

Particles are made up of atoms, and there are many protons and neutrons in the particles, and there are many components.

I studied physics.

I think all the people who do physics research have to have their own explanations, so that they don't fail.

Photons are also particles, electrons are also particles, including neutrons, etc.

We can all think of this as a kind of wave, a particle wave.

The only reason they can be discovered by humans is that they have energy.

Something that cannot be discovered by humans without energy Human beings sense the presence of energy from objects when they feel the presence of them.

These energies are simple or complex waves of ability, and the energies have their own band periods, so humans can sense the uncertainty of these particles, and when these energies are converted into other energy waves, the particle's lifespan comes to an end, and we say it's annihilated.

Microscopic objects and macroscopic objects are actually the same side, and we can feel the wonder of these microscopic particles from natural phenomena such as sound waves, water waves, storms, etc.

Microscopic particles have their own structure, just like macroscopic objects, but we have to assume that the vacuum is not empty, it's a relative zero-point medium, and these mediums have energy and become particles that we can observe.

If you feel that the above makes sense, welcome to communicate with kivi