Black hole:-
Black Hole is a widely known concept of the existence and nature of the universe. According to this concept, the black hole is an object in the universe that is so thick or in very small size its mass is so much that its The gravitational force does not allow anything to come out of it, even in electromagnetic radiation (eg light). In fact, the general gravitational force in this place becomes so high that it crosses all the other balls of the universe. As a result nothing can escape from this. In the eighteenth century, the existence of black beacon was raised on the basis of the first gravitational concept.
History of black hole study:-
Geologists John Mitchell gave the first thought of a large mass of objects, which can not escape the gravitational effects of light waves . In a letter to him, in 1783, he told the members of the Royal Society and the scientist Henry Cavendish. In 1796 , the mathematician Pierre Simon Lapless gave the same concept, in the first and second editions of his exhibition du système du Monde. But the following versions did not have any idea about this. Such views regarding black hole were neglected in the nineteenth century. Because of the massless wave like light how gravity is power It was not understandable that could be affected by.
General relativity:-
In 1915, scientist Albert Einstein in his general theory of relativity evolving said. Before this, the problem of light motion affecting gravity was proven. A few months later, Carl Schwartzchild, Einstein, found a solution of Field Ecuasion that describes the gravitational field of dot mass and spherical mass. Then the scientist Hendrik Lorenz's student Johannas Drost gave the same solution for the point of independence and published more details about its religion. This solution was a diverse behavior.
Event horizon:-
According to general relativity , event horizons have no place on the boundary of the place-time of an event, which has no effect on any observer outside. In general it can be said to be "the end point of the return" where the force of gravity is so strong that it is not possible to move away from any particle. The event horizon is mainly associated with Krishna Bibar. The light from the event horizon can not reach the outside observer. Similarly, the motion of the particles coming out of it seems to be slow and it does not cross the horizon completely, but its red blood circulation over time. The particle does not feel the effect of adverse effects and crosses horizons in the real-time of a finite value.
There are more prominent types of horizons, such as the horizon and the apparent horizon, around the black hole. Apart from this, Koshi horizons and murdered horizons from some other distinct ideas; Photosphere and argo-sphere of stem mixes; Cosmological particle horizons and cosmic horizons; Isolated horizons and dynamic horizons are important in the study of black holes. Explosion.
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