The concept of Black Hole

Don't be fooled by its name. A black hole is not really a hole as its name suggests. Before diving into the topic let's first be familiar with a few terms.

black hole,black holes,black,hole,what of we drop into the black hole,first black hole,can we see a black hole,astronomy (field of study),singularity black hole,interstellar black hole

Image of a Black Hole

Escape velocity- The lowest velocity with which when an object is thrown from any cosmic body [planets, stars etc] escapes or moves out of its gravitational pull. The escape velocity of the Earth is 11.2 Km/s.

Event Horizon- The boundary after which no light or other radiation can move out after striking a black hole. Light cant escape out completely from the pull of a black hole but it does come to a certain limit, that's event horizon of a black hole.

A Black Hole is a super dense, massive object with an infinitesimally small volume having escape velocity higher than the velocity of light. And nothing can move faster than light so, nothing can escape out of a black hole. This is the reason it appears completely dark because even light can't reflect back from it.

Think of a star, as massive as the Sun, squeezed to the size of a football. It is capable to engulf everything that enters into its inner layer(inner event horizon) because of its intense gravitational pull. It wraps space-time fabric in such a way that the light which have enough velocity to convert mass into energy(E=m c^2) and vice versa, even can't escape. It can be termed as a region where eveything disappears.

It was first predicted by the 'Einstein's General Theory of Relativity'. Its interpretation as a region from which nothing can escape out was first published by David Finkelstein in 1958, although Karl Schwarzschild gave the first modern solution of general relativity characterizes a black hole back in 1916. The first picture of a black hole was taken on May 10th, 2019.

3 layers of black hole

Outer event horizon(light can escape through it as escape velocity=c)
Inner event horizon(escape velocity is a lot more than c, nothing can escape)
Singularity (the highly massive, less voluminous)

Formation

These are formed when a highly dense star collapses itself. This is due to the star's age. As the star ages, its gravitational field gets stronger (it emits the radiations and fuel. Hydrogen & Helium collapse, particles and antiparticles form and finally mass increases), it can't get hold of its own gravitational field which results in its reduced size.

A star dies and forms what we call as Black Hole. After its formation it can continue to grow up attracting the matter and radiation around it.

End

Interestingly, a black hole dies but the age of Black Holes exceeds the age of the Universe.

Comments

GOD! or SCIENCE?

One can question the existence of the God, the almighty, but can't question the belief of the people. The most controversial topic of current time and the never ending debate between religion and science- THE EXISTENCE OF THE GOD. We all must have heard one or more of the words: God, Allah, Bhagwan, the Almighty, Ishwar etc since the day we stepped into this massive universe. These all point to the same power, the supreme one. The power that drives the universe, that drives you and me and every other creature. The force that exists within each and every elementary particle. Some people having keen interest to question all the things around them, known as Scientist, believe what they see and what get through various complex equations. And 'the existence of the God' too didn't remain untouched. Perhaps, there is nothing wrong in finding what's hidden inside the nature's womb. It just get us closer to the mighty universe. That's what a scientist alw...

What if you fall into a black hole?

After getting bored from you lectures, assignments and exams, it's a good idea to go out for a spacewalk. Isn't it?😄 Oh wait! Jumping into a black hole seems to be a better one. Have you ever imagined the situation into a black hole ? What would happen if you enter into it? The reality might be weirder than your expectations. Well, a black hole is that cosmic mystery which may tear apart all the physical laws into pieces. So, you might have to think out of the box. Before entering into the black hole you have to pass the accretion disk which is too hot to be imagined, spitting out Hawking Radiation, and finally the event horizon. Suppose, anyhow, you have succeeded in overcoming these nightmares, what's next? There are the opinions of a few intellectuals about the further possibilities: 1. If you were to take a jump into a black hole, your body would most closely resemble "the toothpaste being pushed out of a tube," said Charles Liu, an astrophysi...

String Theory. Know on the go.

String theory We rely on string theory to understand and to combine the quantum theory and the gravity. As the name suggests, whole theory is based on string like structures. The one dimensional objects which only have length. The lies and move through background spacetime. The advance version of string theory i.e. superstring theory is considered as THEORY OF EVERYTHING . So what string theory exactly is ??? Strings are one dimensional objects that contain energy and by there flow, one can say that energy is moving. Suppose we take a long thread and tie a knot, it will became a loop, similarly strings are joined to make a loop known as Heterotic string. These are 5 independent strings theories, telling the same thing but in different dimensions. Combination of all the 5 string theories is known as S uperstring theory . Let us see how it works... Consider a violin, the strings attached to it, are producing waves, which are the source of energy. Havin...

3 astonishing theories about the universe

There are a number of cosmological models and theories you might have heard about. Many of them answer most of the questions but not all. The curiosity and the quest to find the answers often result in more theories. Here we present 3 astonishing cosmological models about the universe. After all these are still theories as none has been proved yet. 1.White Holes You must have heard about the Black Hole ( click here ). A black hole is the result of a star which has died, creating a highly dense and massive body which sucks in light and all other matter surrounding it. But where do all these matter and energy go? White holes are just opposite to black holes. Instead of sucking in, they spit out everything what the blackhole absorbs. It is an area in spacetime which couldn't take anything in but throw it out into its surrounding. This was an hypothetical model created using the concept of relativity. If one will be ever found in future, it might disprove many laws of ...

New Gyanam

Search This Blog