Some Observation On Black Hole

  After or till 1960 there was only one topic in every scientist's mind,i.e., the black hole. Before 1960 or in 1920 to 1930, the scientists were afraid about that the theory which is given by them about black hole may be proved wrong and their career may be end but since 1960 they were as much as confident that all the scientists were calculating about it or analyzing about it. In this blog we also read about the contribution of greatest scientist Stephen Hawking.

Stephen Hawking

In 1960 when all the scientists were doing observation about the black hole, there were some proposals come. Using relativity theory a group of physicists proposed that the  black hole should be in a spherical shape but that can only be possible when the star is perfectly spherical, some of the scientists understood that thing but some of them were not. But not all the stars are spherical in shape and this can't be possible and it can't be a black hole. Again another group of physicists proposed another theory that is, after some calculation we are getting the point that the black hole should be spherical in shape but it is not important that it should be spherical before it was a black hole. It can be possible that the space time fabric, which was given by Einstein, may be convert the shape of the black hole in spherical shape. Then they also said that the black hole have only three properties that are: (1)Mass, (2)Angular momentum, (3)Charge   

  Now here a controversy arises that is, there is a law in thermodynamics which tell us that if anything in the nature is happening naturally then the randomness will increase, but there is no increase in randomness in black hole. To solve this controversy now came the hawking radiation which says that there is also radiation in a black hole. Now came into the physics world, the scientists has told that in our universe there is a anti-particle of every particle, now there is a big thing to know us that every particles are breaking down in every nano second or pico second and combine with each other, this process is called annihilation. Now you are seeing my blog in a screen, there is so many particles which are breaking down and get combine in between you and your screen but the energy of break down and energy  of combination is present in your house, office or anywhere you sit. Now if we take a particle in the circle around the black hole, which breaks into particle and anti-particle and if the black hole engulf the anti-particle or the negative particle then the black hole is evaporating.

  Scientists are thinking that when there was a big-bang, so many black hole may be made which are so far from us and may be some of them will evaporate soon, to observe this activity a telescope was made in 1990, that is Hubble Space Telescope.

Hubble Space Telescope

  There is question arises that is the relativity theory is not obeying or cutting all the theory of Einstein that there nothing like black hole in nature? 

  Now came LIGO (Laser Interferometer Gravitational-wave Observation), in which there is L type tunnel in which laser beams go in two direction and get reflected by walls and get merged at initial point, so if any gravitational wave came during any disturbance in universe then the gravitational wave will deflect the beam and we will know about the disturbance and this happens in 2017-18. 

LIGO (Laser Interferometer Gravitational-wave Observation)