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- With no light escaping from the black hole, there is no way that anyone watching from a distance could actually witness your descent. In space, no one can hear you scream; and in a black hole, no one can see you disappear.
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Singularity
- if you take pressure out of the calculation,a uniform spherically symmetric star would contract to a single point of infinite density,I.e,Singularity.
- A singularity is what you end up with when a giant star is compressed to an unimaginably small point.
- It refers not...
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What is a Black hole ?
Black holes cannot be seen as they don't reflect any light.
The centre of black hole is called singularity - a point of infinite density i.e the space curvature extends to infinity.
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Formation of Black holes
- During most of the life of a normal star, over many billions of years, it will support itself against its own gravity by thermal pressure, caused by nuclear processes which convert hydrogen into helium.
- The explosive force of nuclear fusion inside them creates outward pressure which ...
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Can‘t see , but how do we know their existence
- But scientists know they exist because they rip apart stars that get too close to them and because they can send tremors through space.
- It was a collision between two black holes more than a billion years ago that triggered what are called ‘gravitational waves’.
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Information
- All the black hole will remember is the total mass, the state of rotation and the electric charge.
- A black hole has a boundary, called the event horizon. This is where gravity is just strong enough to drag light back and prevent it escaping.
- Because nothing can travel faster...
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Einstein‘s View
- It was already clear that a uniform spherical star would contract to a point of infinite density, a singularity.
- Einstein’s Theory of General Relativity says that objects distort the space-time around them.
- At this point of infinite density, one can’t predict the future, whic...
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Event horizon
If you look directly at a black hole it looks like nothing. the space is under their control is blocked by an invisible one way border called the event horizon.
The event horizon forms a sheel around a region of space that, once entered, is shielded from the rest o...
What is inside black hole?
A black hole is a region where gravity is so strong that light cannot escape itself.
A black hole has a boundary called the event horizon. It is where gravity is just strong enough to track light back and prevent it from escaping. Because nothing can travel faster than ligh...
Hawking radiation
When this happens near the event horizon of a black hole, one of these particles call fall in, stopping them from annihilating.
- The escaping particle is hawking radiation. ultimately the mass of this particle must come from the black hole, so over eons black holes...
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