Extreme Physics of Black Holes - Part 1

This video goes into the physics associated with black holes. We know very little about what happens to mass and energy inside a black hole, but the boundary, called the event horizon between inside and outside is well defined as is the phenomena near that boundary. We investigate that here.

Category:

Howto & Style

Tags:

• Astronomy
• Physics
• Astrophysics
• Education
• Lecture
• Black
• Holes
• Quantum
• Degeneracy
• Pulsars
• Neutron
• Stars
• White
• Science

[pjholl]

You said at 04:05, that "gravity is warped near a high mass", and that a gravitational field warps space-time. Thats not true, as it is mass which warps space-time giving the effect of a gravitational field, sorry to be picky, but i couldnt ignore it! Nice vid though.

[jas2754]

Thanks for the clarification.... you are correct.

[WisdomVendor]

I still don't understand why it is called a "hole" which to me implies it is a 2-dimensional region. When in reality, it would have to be a "black sphere" since the gravitational "waves" created by a singularity must be radiated in all directions from the singularity in 3 physical dimensions.

[jas2754]

Your point is well taken... the naming is not really scientific.... it comes from the notion that mass and energy can fall in but can never get out.

[ORACLE063]

Thank you for your response. Time stopping is another paradoxical outcome. If time has stopped for a known object falling in. Then in truth its not falling. Simply amazing. The more you find out the more you scratch your head. The more you want to know.

[jas2754]

To the Outside observer...the falling object is no longer changing, and because of the red shift.... it is disappearing as well...at the moment it is at the event horizon... time stops and energy representing it cannot escape.

There are wonderful paradoxical objects. that push all sort of limits.. read Stephen Hawkings...he is the expert on BHs! ;-) Dr John (who is originally from the Bronx)

[FOXMcCLOUD74647]

i think you mean worm hole

[VerItasninja0]

Not true matter does escape black holes. When a black hole absorbs matter. Intense amounts of heat is released and matter is exejected also.

[superman653421]

WisdomVendor; It is called a "black hole" because it like jas2754 said, mass and energy falls in, not only this but light can not escape it, therefore it is like a hole, light falls in, mass, energy falls in but can not escape.

[dim12trav]

Singularity is merely a mathematical concept it is not a real thing and the idea of infinite mass is preposterous the whole universe has a definite mass so how could anything within it have more mass than the universe. It makes no sense

[iridethewave]

mass isn't a basic unit. Define it and you will find your answer.

[cephyric]

i no reit?

[StevoDog21]

Yes, the volume is zero. At the point of singularity, all diffeomorphism invariant quantities become infinite and the size = 0 in all spatial dimensions, with infinite density, infinite temperature, and infinite space-time curvature.

[libbeingcool]

so if the density is infinite, then the volume must be zero??? because density = mass / volume.

[libbeingcool]

there are three things we know about black holes by measuring the affects it has on other matter these things are: mass, charge, and angular momentum.

<3 ^_^

[I3radrick]

We can't really study black holes because light can't even escape the gravity of a black hole. Therefore we can not see them. We only have some evidence that they are there because of the magnetic fields and random disappearance of things in space. Correct me if I'm wrong.