Stephen Hawking's view of black holes

March 14, 2018, Stephen Hawking became more resonant than before. the death of the most famous physicist after Albert Einstein filled the virtual world, across the vastness of the ocean. Stephen Hawking slept forever at the age of 76.

He is often dubbed the smartest living human being. One of Stephen Hawking's great contributions to physics is his theory of black holes. A black hole is a very massive object so no one can escape from the pull of gravity.

Starting a black hole is only considered as a mathematical object born of the general theory of relativity only. But now we know that the black hole really exists in the real world.

Our mind is shaped by experience. We think that heavy objects fall faster than light objects. This is because in everyday life we do see it that way. But after we look more closely it does not. Heavy objects and light objects fall together when air resistance is removed. This is the reason why the theory of relativity and quantum theory is hard to digest by the mind. In everyday life, we never deal with objects that go super fast. That's why we should not be too confident with our thoughts.

The law of conservation of energy is a very logical law, in accordance with our daily thoughts. It is impossible for matter to appear suddenly from the void. But it turns out two plus two is not always equal to four. Quantum theory has modified the law of conservation of energy through a principle whose name is Heisenberg's uncertainty. The material may suddenly emerge from the absence provided that it vanishes immediately. The consequence of this is very spectacular. Heisenberg's uncertainty principle gives us a new understanding of what voidness is.

What comes to mind when we hear the word "hollow"? Our minds describe emptiness as emptiness, dark black, nothingness, nothing there. But it turns out that quantum theory says something else. The vacuum is not really empty. The vacuum was full of activity. Couple particles and anti-particles suddenly appear then meet again and mutually eliminate. Appears to disappear, reappear, disappear again, and so on. According to quantum theory, a vacuum is a very crowded place. This quantum theory is used by Hawking to describe black holes.

Today almost everything that exists in the heavens and on earth can be explained by two major theories of physics, the theory of general relativity and quantum theory. The general theory of relativity is able to explain massive objects such as stars, galaxies, and the universe. Meanwhile, quantum theory is able to explain small objects such as atoms, protons, and electrons.

Normally large mass objects must be large in size so we do not need to review them with these two theories. But there are two places where small objects have a very large mass at the center of the black hole and at the beginning of the universe.

To find out what happens at the center of the black hole as well as at the beginning of the universe, we need to unite the general theory of relativity with quantum theory. This theory of unification is the dream of Stephen Hawking, Theory of Everything.

Stephen Hawking has not been able to figure out what's going on in the center of the black hole because he has not succeeded in composing Theory of Everything. But he has made the first step to get there. Before approaching the center of the black hole, it is better to grope the surface first.

Researching the surface of a black hole does not need to use Theory of everything in its actual version because the gravity there is not as strong as gravity at the center of the black hole. Simply use quantum theory but in a curved spacetime background.

Hawking sees a pair of particles and anti-particles that appear on the horizon of a black hole. A black hole has a horizon or a safe distance. Any object that includes light when it has crossed the horizon will not get out again. That's why black holes are black.

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