Introduction

Black hole also known as the neutron star is defined as the formation which is more complicated than any other physics. It is presumed that while the nucleus of the star i.e. a giant star get collapsed from the original radius which is a few thousand km, this star forms a compressed object having a radius of few kilometers. The particles of the star that starts moving inside initially slowly and later more rapidly with expected the time which is less than a tenth of a second. Later the notable part of this mass and the core contracts considerably in order to increase the intensity of the gravitational fields pulling the inner core together.

The core mass and its kinetic energy which is produced during the collapse may or may not be sufficient to bring the system out of the nuclear intensities. Hence this entire collapse is known as a Black hole. 

History of Black holes

The black hole word termed by Wheeler in 1967 but possibly the existence of black hole was mentioned long before. In late 18th century, two scientist Michell and Laplace conducted their work independently and ended with a conclusion that the size of the star affects the entry and exit of the light ray. If the star has a huge surface area its gravitational field tend to pull the light ray towards itself thereby, preventing its escape. The above concept has been taken from both Newton’s and Einstein theories.