What is Black Hole?
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
Types of Black Holes
There are four types of black holes: stellar, intermediate, supermassive, and miniature.
1.Stellar Black Hole:
A Stellar Black Hole is a Black Hole formed by the gravitational collapse of a star. They have masses ranging from about 5 to several tens of solar masses.
2.Intermediate Black Hole:
An intermediate-mass black hole is a class of black hole with mass in the range 102-105 solar masses: significantly more than stellar black holes but less than the 105-109 solar mass supermassive black holes.
3.Supermassive Black Hole:
A supermassive black hole is the largest type of black hole, containing a mass of the order of hundreds of thousands to billions of times the mass of the Sun.
4.Miniature Black Hole:
Miniature black holes, also called quantum mechanical black holes or mini black holes. They are hypothetical small black holes, for which quantum mechanical effects play an important role. The concept that black holes may exist that are smaller than stellar mass was introduced in 1971 by Stephen Hawking.
Founder of Black Hole
Karl Schwarzschild
(The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958.)
Who Theorised black holes?
Albert Einstein
What is inside a black hole?
Black holes are generally defined as "a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because [the] matter has been squeezed into a tiny space." - NASA. As light is unable to escape the holes' gravity it appears completely black - hence the name.
What happens when a black hole die?
As Hawking says, the black holes would evaporate. During evaporation, the black hole emits energy in the form of the positive particles that escape. ... So, yes, black holes do die, and they do so when the theories of the extremely large come together with the theories of the very small.
Conclusion:
Black Holes are not hypothetical. But a person cannot see a Black Hole. “You cannot see a Black Hole; you can see only its shadow”. On 10 April 2019, the first ever direct image of a black hole and its vicinity was published, following observations made by the Event Horizon Telescope in 2017 of the supermassive Black Hole in Messier 87's galactic centre.
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