In 1915, Einstein published his theory of general relativity, a tour-de-force that described how gravity arises from the spacetime-bending effects of matter, and so why the planets circle the sun.
However, Einstein made important predictions about black holes too, notably that a black hole can be completely defined by only three features: its mass, charge, and spin.
Hawking later asserted that they also had a temperature and so obeyed the laws of thermodynamics. "This paper summarizes the status of our long-term project on large diffeomorphisms, soft hair and the quantum structure of black holes until the end of our time together".
Presenting his research on black holes and "soft hair" in 2015, Hawking said, "I guess that information is not stored inside the black hole, as anyone would expect, but on its borders, even in the horizon".
The eminent physicist Stephen Hawking, who past away previous year, was one of the world's foremost authorities on black holes.
He said, "It was very hard for Stephen to communicate and I was put on a loudspeaker to explain where we had got to". I told him weâ€™d got somewhere. "He knew the final result", he said.
For example, when a black hole swallows some object, its temperature should change, theoretically, as should its entropy - the inability of the system to convert its thermal energy into mechanical work, causing the disorder of its particles. Entropy is a measure of the number of different ways the microscopic constituents of a black hole can arrange themselves. Classical physics suggests that nothing could escape a black hole, even light. Eventually, black holes will evaporate, leaving a vacuum that is the same everywhere else. This solves the information paradox. "It's telling you that soft hair really is doing the right stuff", Perry went on to say.
The new paper seeks to address this information paradox. The formula for the temperature of a black hole - the Hawking temperature - is inscribed on the memorial to the great scientist at Westminster Abbey.
Perry said, 'We still don't have the technology to verify Stephen Hawking's big ideas.
This new theory shows that the entropy of the black hole present in the photons can able to bounce around the event horizon.