Black holes are considered to be formed when the mass of an object confines to such a low volume, that the density increases to very high value, the critical density. At this density the gravity becomes so high that collapses the object into itself and finally a black hole is formed. Usually a black hole is formed when a dying star with a mass greater than the 20 times the mass of our Sun collapses into itself. A black hole has a very large area of influence around itself called its horizon. Anything in its horizon will be surely attracted to its center called the singularity.
The pull of the black holes is so strong that even light cannot comes back if it goes in the horizon of a particular black hole, We know the light is composed of photons which are in the class of bosons.As I said earlier everything that is attracted by a black hole , strikes the singularity which is of course the center. Now the question arises weather that particular object is jelled with the singularity or revolves around the central point? That is a mystery , if we suppose the object is jelled with the singularity then we have to tell in which way that object is jelled? The object which certainly comprises of protons, neutrons, electrons microscopically of quarks and leptons and statistically of bosons and fermions , weather their statistics is changed or not?
The pull of the black holes is so strong that even light cannot comes back if it goes in the horizon of a particular black hole, We know the light is composed of photons which are in the class of bosons.As I said earlier everything that is attracted by a black hole , strikes the singularity which is of course the center. Now the question arises weather that particular object is jelled with the singularity or revolves around the central point? That is a mystery , if we suppose the object is jelled with the singularity then we have to tell in which way that object is jelled? The object which certainly comprises of protons, neutrons, electrons microscopically of quarks and leptons and statistically of bosons and fermions , weather their statistics is changed or not? 
Another concept about black holes is also present that any material which is being attracted by a black hole is pulled with so much power that the object starts accelerating at very high speed which approaches the speed of light, not sure it is so or not, but in this way everything in first step will be converted to photons then reaching singularity it will revolve around the point or will be materialized once again.
But who knows the truth , to be aware of truth we have to go near or in fact inside the horizon but only we will be aware of the fact not the world. Because the hole will never let us to tell you the fact. It is the fact.
