Stephen Hawking says about Black hole that it is not quite black. Rather, it radiates energy from its event horizon. This radiate energy is named as Hawking radiation according to the name of physcist Stephen Hawking. Event horizon is the boundary of black hole from where the minimum effect of black hole exists. Recent discovery of science is Black hole information paradox. According to black hole information paradox, everything engulfed by black hole is displaced and transform into information and these information convert into energy and finally radiates through event horizon of black hole.