There are many systematic mistakes in modern physics, all because of the wrong understanding of the nature of light and the law of interaction between light and medium. Only by correctly understanding the essence of light can we set things right and return to the right track from the wrong path.
Most people can't accept this reality, but that's the truth. It is hoped that Chinese Academy of Sciences, China Association for Science and Technology, mutual universities and research institutions will seriously study and correct relevant mistakes in time.
Interested friends can further consult my following articles to re-understand the present situation and future outlet of physics.
A black hole is a single celestial body with the strongest gravity in the universe. It usually has a huge mass, and its volume varies with the mass. However, we often say that the size of a black hole is not its physical size, but its virtual size under the horizon rule. Because it absorbs light, we can't see what a black hole looks like, and we can't touch the black hole entity, so we regard the size range of its schwarzschild radius edge (horizon edge) as its volume, but the horizon edge of a black hole is actually the place where electromagnetic radiation such as light can't escape from the gravity of the black hole, not the physical surface of the black hole. So where is the real entity of the black hole? Inference should be its singularity, which is the ultimate attribution of matter in a black hole.
At present, the existence of black hole singularity is only an inference, because matter will still be compressed after entering a black hole, and it will be compressed to a smaller state than neutron stars and quarks. How compressed will it be? Nobody knows. So what is the singularity of a black hole? We can't know, or even never really observe and touch the singularity of the black hole, because it is almost impossible to get in and out of the world inside the black hole. Entering a black hole can only go back and forth, and the huge gravity of the black hole will decompose the entering object.
The inference of black hole theory is that the singularity of black hole is infinitely small, infinitely dense and the space-time is extremely curved. The known laws of physics do not apply here, but are the singularities of all black holes the same? Are they all infinitely small? Such an inference is also difficult to establish.
Inferred from the existing astronomical and physical phenomena, the singularity of black holes will indeed be very small. Because a star with the mass like our sun will become a white dwarf when it becomes a red giant in its later years, its volume will be only one third of that of the earth, but its mass will be about 0.8 times that of today's sun. A star with eight times the mass of the sun will become a neutron star through supernova explosion, with less than three times the mass of the sun, but its volume diameter is only10 ~ 20km. Quaker is smaller, but the same.
Simulations of white dwarfs (large) and neutron stars (small)
When a mass of matter is attracted to a black hole by the gravity of the black hole, it will be decomposed into molecular state and atomic state, and then the atom will be broken, and even the quark state cannot be maintained, so the singularity as a black hole entity is definitely smaller than that of quarks.
A black hole is a celestial body with a particularly large mass span. Physicists believe that there will be black holes at the elementary particle level and black holes at the galaxy level. The basic particle-level black hole is too small to be found by the most advanced microscope at present, and its life span is extremely short. The mass of black holes at the galaxy level can reach tens of billions of times that of the sun, and the size and state of singularities of black holes with different masses should be different. As for the size and state, it is difficult to infer the singularity because of the physical laws in black holes.