After objects fall into black holes, outside observers cannot observe object properties, because nothing can come out except Hawking radiation, which is random and has no information. Outside observers can only measure total black-hole mass, charge, and angular momentum. All object information is lost, but there should be information conservation {black hole information paradox}. By string theory and quantum-loop theory, because strings are unitary, information is constant {unitarity} {unitary process}, and object information goes into event-horizon surface area. Perhaps, when black holes evaporate and so have no event horizon, outside observers can see all information again.
Physical Sciences>Astronomy>Universe>Cosmology>Singularity>Black Hole
5-Astronomy-Universe-Cosmology-Singularity-Black Hole
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0224