Nobody knows. Nobody knows. It is the nightmare of any substance in the universe and the natural enemy of civilization. Both neutron stars and photons are invisible and inevitable in the face of the strong gravity of black holes.
However, as we all know, photons themselves have no mass. Since there is no mass, it will not be attracted by gravity. Then why can it be captured by a black hole? This is actually a very interesting question, starting with the birth of the black hole theory.
The establishment of black holes was put forward by Einstein, a great physicist in the last century? General relativity? System. In the general theory of relativity, Einstein believes that there are Schwarzschild singularities in every corner of the universe, which affect the change of dimension;
Schwarzschild singularity represents the disorder of space-time system and is the chief culprit of black holes. What is the nature of gravity? In Einstein's view, it is the bending of time and space. Yes, space-time bending is everywhere, as long as there is gravity, there is constant change of space-time;
It's just that the curvature of spacetime near the black hole has expanded to almost infinity. Therefore, although the photon itself will not be affected by its gravity; But it will also pass through the complex space of the black hole, which has been twisted to the limit. From the perspective of external observers, photons are captured by accretion disks on the surface of black holes.
But in the original space-time trajectory, photons are actually unaffected. This is the magic of relativity; In fact, if we observe the photon from the center of the black hole, we can find that it has not moved at all.