1. History of Black-hole:-
The first time the idea of a black hole was suggested was in
the late 1790´s by John Michel of England and Pierre-
Simon Laplace of France. They both proposed the idea of
the existence of an “invisible star” by applying the first
Newton Law. They calculated its mass and size, which is
now called the “event horizon” that an object would need in
order to be faster than even the speed of light.
2. History of Black-hole:-
Later, in 1915, Einstein predicted the existence of
black holes with his general relativity theory.
After that, in 1967, John Wheeler, an American
theoretical physicist, applied the term of black holes
to what it means now.
3. Types of Black-hole:-
• Miniature black holes:
These type of black holes have event horizons as
small as atomic particles. Physicists suggest that these were
created during the Big Bang. Miniature black holes were
created more than 10 billion years ago, and they compressed
into a really small point, which later exploded and created a
massive explosion.
4. Types of Black-hole:-
•Supermassive black holes:-
Fast-moving gas jets and gravitational forces
are equal to 10 billion suns compressed together. These are what
we call supermassive black holes. Their event horizon is an
imaginary sphere around them which nothing can escape. When
matter enters the black hole, it increases in size, reaching other
matter which it could not absorb before.
5. Parts of Black-hole:-
The singularity:-
This is the part of a black hole in which all the mass of the black
hole has been compressed to a very small space. As a result, the Singularity
has almost infinite density.
In the center of a black hole there is a gravitational singularity. A one
dimensional point with huge mass about which eminent American
Physicist Kip Thorne says:-
“It is the point where all laws of physics break down”.
6. Parts of Black-hole:-
Event Horizon:-
Nothing can get out of its range.
It can absorb everything even light.
According to some theories only radiation scan escape
this area.
