Tuesday, January 29, 2019

Black hole

So what is a black hole? , the black hole is a highly dense substance which as the very strong gravitational force from which nothing can escape even light cannot escape from it. This concept of a black hole is introduced by the scientist John Michell.

How black hole is created?



A black hole is created when any big star gets old, means hydrogen gas of that star gets completely finished.

Stars are very big and their the gravitational force is also very strong. This force attracts the star in the center of the star but, in the center of the star hydrogen gas is present which continuously expand due to the heat of the star. This expansion of hydrogen gas creates a force which opposes the force of the gravitation. but a time comes when the hydrogen gas is completely finished and at that time there is no force which opposes the gravitational force. At that time If the size of the star is near the size of our sun then the star gets compress and convert into a neutron star. But if the size of the star is greater then our sun then the star start to compress continuously and the size of the star gets too small, all atoms of the star get to close and the gravitational force gets very high. Because of such high gravitational force, the star starts to attract everything near it now this star is called a black hole. 

The black hole eats everything around it and continuously increase his density because of continuous increase in the density the gravitational force also gets continuously increase and the black hole gets stronger and stronger.

Use of the black hole for time travel


Einstein proves that the time is slow near the high-density object. Hence we can use a black hole for time travel.

But it is not possible to use a black hole for time travel because they are very strong if we go near a black hole then they will suck us. We don't what is inside a black hole we only know what is outside of a black hole.




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Black hole

So what is a  black hole ? , the  black hole  is a highly dense substance which as the very strong gravitational force from which nothing c...