# Theory of Relativity and Black Hole

## Einstein and Black Hole

Do General Relativity is connected to Black Hole? If yes then how? Today, we will try to get the answer.

Now, what is General Relativity? upper photo credit- NASA

General Theory of Relativity is a geometrical representation of gravity. When we put mass on the fabric of space-time the gravity is generated. In a practical aspect, Newton’s gravity is best. When it comes to explaining the motion of planets from our solar system newton fails. Here comes Einstein in the picture. General Relativity explains the motion of our solar system.

General Relativity is represented by

R_{μν} = **Ricci Tensor **

R= **Ricci scalar****g**_{μν} = **Metric T****ensor**

T_{μν = stress-energy tensor}

Actually this is not just a single equation. These are Einstein Field Equations which is a set of ten equations.

Recently LIGO has detected gravitational waves. That gravitational wave gives hint about the existence

Image from the LIGO

of General Relativity. Some scientists believe that gravitational waves were created by the collision of two Black Holes. Back in 1915 when Einstein introduced General Relativity it was tested in solar eclipse by Eddington in 1919. General Relativity has passed all the tests until now.

Karl Schwarzschild got the solution of Einstein field equations which gives description about point mass. After many physicists give a solution to Einstein field Equations that found the object. An object that nothing can escape from that due to its gravity. That object is nowadays known as black Hole. Black Hole is having too much strong gravity.

When something falls in Black Hole the information of the object is destroyed. Black Hole is having regions like event horizon and singularity. The event horizon is the boundary of space-time from which nothing can escape. Singularity is located at the center of Black Hole. Singularity smallest point of mass in space-time. All the laws of physics Breakdowns at Singularity.

To form a Black Hole we just need to compress physical size less than the event horizon. Our sun will be converted into Black Hole if its compressed to a radius of 3 kilometers.

The first image of Black Hole is just released. We First-generation ever to witness the First image of Black Hole. So there is no doubt about the existence of Black Hole.

Answer me how they take a picture of a black hole ,

Light are not possible to escape from it . Nothing can escape from it. Then like this type of object black hole , how can they take a picture of it….Pls answer me soon

Light isn’t coming from the black hole itself, but the accretion disk just outside the event horizon surrounding the black hole. It has a high turbulence & the debris in it collide with each other with very high kinetic energy. This accretion disk , due to its storming debris gives out low wavelengths of light ( not visible light) & then captured by us & replicated the data in the form of an image.

P.S.- If anything wrong, please do tell.

It is not only debris but accelerated particles which are created after the supernova. The immense energy is also from light which travels at a high speed around the accretion disc.

Might the Singularity at the centre of Black Holes be spawning new universes? If so, diminishing returns? What of WhiteHoles?

Any thoughts or ideas on the nature of Singularities? Ultimate origins? Where did the almost(?) infinite amounts of Mass and Energy in our Universe come from?

It is possible that our Universe is ‘Open’ and still interactive and has input, and visa versa, with the Source; whatever that may be, as opposed to being a closed universe mass and energy-wise?

One woman I encountered has the idea that Dark Energy that is driving our universe apart at ever increasing rates is due to Conscious Awareness entering into and arising in our Universe at accelerating rates.

Yes I have atheory in dark matter that it creatws dark energy leaving mass undefined. So the singularity of a black hole is basically dark energy being vreated which increases the tensor values incthe field equation