A black hole is the region in space time from which gravity does not allow anything to escape. According to the theory of general relativity a black hole represents the compact mass in the space time. According to different researches the studies revealed that a black hole is surrounded by a surface called the event horizon that indicates the point of no return. Due to its ability to absorb all the light and reflect nothing, the black hole is given the sub name “black.” According the quantum field theory, event horizons produce radiations similar to the radiations produced by the black body at a certain finite temperature. This temperature has an inverse relation with the mass of the black hole. The greater the mass of the black hole, the less will be the temperature and the smaller the mass of the black hole, the greater will be the intensity of temperature.
John Mitchell and Pierre-Simon Laplace for the first time in 18th century considered the objects with high gravity field for light to escape. A black hole was first characterized in 1916 by Karl Schwarzschild. Later on the theoretical work on black holes in 1960 showed that they were the generic prediction of the theory of general relativity. The black holes with astral mass are supposed to form when the gigantic stars at the end of their life cycle are collapsed. Once a black hole is formed it can continue to grow its size by accumulating the mass form its surroundings. Millions of solar masses may merge together to form the super massive black holes. It is said that super massive black holes exist in the center of many galaxies.
The interior of the black holes is almost unseen then question arises that how their presence is felt. The existence of the black hole can be predicted through its interaction with electromagnetic radiations such as light and with other matters that exist around in the space time. If a black hole is surrounded by the other stars, then the orbit of these stars can be used to find out the location and mass of the black hole. The simplest black hole has the property of mass but does not contain angular momentum or charge.
When a black hole is created, it possesses only three properties. These three properties include the angular momentum, charge, and mass. According to the classical mechanics the two black holes are indistinguishable from each other even if they have the same properties. From here, you can access the complexity of this gigantic object. A charged black hole has the same properties that are possessed by the charged particles. For example, two black holes with similar charges attract each other, and if they have, unlike charges they repel each other. Such simple black holes are called Schwarzschild black holes. Any object outside the black hole when falls into the black hole then disappears from the view of outsiders. Without any doubt, the mysteries of the world still have to be explored when the man has covered many milestones of success.
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