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originally posted by: Arbitrageur
a reply to: dragonridr
Yes, many complaints I see about black holes relate to the singularity and infinite density math and some people aren't thrilled with the concept of neutronium either, so the idea is to show that escape velocity can be greater than the speed of light without invoking densities unfamiliar to us. However in practice most black holes are far less massive and therefore have higher average density in the event horizon than in that example, so they would need have to have some form of ultra-dense matter to fit within the event horizon.
One problem I had with gravity waves is confusing the terminology with gravitational waves (not the concepts, just the terms), and you might agree since I think you're referring to gravitational waves, and yes those aren't easy for me*. Gravity waves are easier, and I agree with this author that they should be called "buoyancy waves" because it's too easy to confuse the term "gravity waves" with "gravitational waves". (The link is a powerpoint file). So how do we get them to stop calling them gravity waves and start calling them "buoyancy waves"?
I sort of understand how this article is saying gravity waves were detected, but I really haven't studied the science yet and wonder how widely accepted this result in in the scientific community:
detection of gravitational waves by the BICEP2 experiment at the South Pole
If that is widely accepted it seems like a significant milestone in gravitational wave evidence. It would be nice if LIGO could detect them, but I have no idea what their chances are; they are still trying as far as I know. I do know that professor Weber never stood a chance of detecting them with this apparatus in 1965:
originally posted by: dragonridr
originally posted by: KrzYma
originally posted by: dragonridr
reply to post by poet1b
What is force ok ill play its the push or pull on an object from interaction with another object. Are you playing with definitions again we all know you like to do that?
this is the result of force not what it is !
what is force two electrons exchange with each other ?
(ups... question could be a hint )
You dont even know what definiton your looking for see your looking for exchange force not force the two are different. Well the exchange force is a photon between two electrons which generates a magnetic field. See electromagnetic forces are carried through the photon. I have a feeling you weren't aware of this so im guessing you believe differently. As i told you dont get into particle physics unless you have the background.
originally posted by: Arbitrageur
a reply to: KrzYma
As George Box said: "All models are wrong. Some are useful".
I have yet to see a model that I think is a perfect representation of reality, but there are some very useful models that make accurate predictions used my mainstream scientists, and they are all way better than the crackpottery videos you share here from guys like Rupert Sheldrake, Steven Crothers, and electric universe proponents.
At least scientists are honest about what they don't know, and you're right about one thing: there's a lot we don't know. But the electric universe claims can be rejected with a slight amount of scientific scrutiny. Would you rather believe a claim that can easily be proven wrong than accept that mainstream science doesn't have all the answers yet? The EU folks definitely don't have the answers.
At least scientists are honest about what they don't know
originally posted by: poet1b
reply to post by Arbitrageur
More accurately you have a model of an elliptical orbit that basically works, and you feel that you can apply that model to the galaxy.
The problem is that you only have a minuscule segment of the orbit of these stars, and science has no idea whether or not it matches their model.
I don't believe you. Why? Because all the videos you post are from cranks, and not mainstream scientists. I also think this is why your head is filled with ideas that scientists dont' admit their own ignorance, because this is the propaganda that EU proponents are feeding you. You should try listening to some real scientists for a change. You mentioned black holes, here's a mainstream admission of ignorance about those.
originally posted by: KrzYma
I can't see it, can't see it looking at space-time or black holes or CERN
the scientists are very sure they are right in what they believe to know.
BTW: I'm processing the EU idea parallel to MS Science
How much more of admission can you get than saying we aren't sure and we may have to find a new conceptual basis for all of physics?
Nothing seems to prevent the black hole from radiating away all of its mass and disappearing completely. Thus, all information about the object from which the black hole formed seems to become forever inaccessible. It is not yet firmly established that black holes really destroy information in this way. But if they do, we face the daunting task of finding a new conceptual basis for all of physics.
So they admit that the singularity signifies the breakdown of classical physics. I can find countless examples like these, so for you to make claims that scientists don't admit what they don't know or where their theories break down, you're living in la-la land listening to too many cranks and not enough real scientists.
general relativity predicts that one who enters the black hole is inexorably driven to a “singularity,” a region of infinite spacetime curvature and hence infinitely strong gravitational forces. The singularity signifies the breakdown of classical physics deep inside the black hole. Quantum effects become important there, and classical general relativity cannot predict what will happen.
general relativity predicts that one who enters the black hole is inexorably driven to a “singularity,” a region of infinite spacetime curvature and hence infinitely strong gravitational forces. The singularity signifies the breakdown of classical physics deep inside the black hole
Nothing seems to prevent the black hole from radiating away all of its mass and disappearing completely. Thus, all information about the object from which the black hole formed seems to become forever inaccessible. It is not yet firmly established that black holes really destroy information in this way. But if they do, we face the daunting task of finding a new conceptual basis for all of physics.
general relativity predicts that one who enters the black hole is inexorably driven to a “singularity,” a region of infinite spacetime curvature and hence infinitely strong gravitational forces. The singularity signifies the breakdown of classical physics deep inside the black hole. Quantum effects become important there, and classical general relativity cannot predict what will happen.
originally posted by: ImaFungi
originally posted by: [post=17812985]Arbitrageur
Nothing seems to prevent the black hole from radiating away all of its mass and disappearing completely. Thus, all information about the object from which the black hole formed seems to become forever inaccessible. It is not yet firmly established that black holes really destroy information in this way. But if they do, we face the daunting task of finding a new conceptual basis for all of physics.
How can mass be 'radiated away completely'? Does this imply that all matter is composed of nothing but radiation? That and electron and quarks (or quadrillions of them) can be transformed into pure radiation?
general relativity predicts that one who enters the black hole is inexorably driven to a “singularity,” a region of infinite spacetime curvature and hence infinitely strong gravitational forces. The singularity signifies the breakdown of classical physics deep inside the black hole. Quantum effects become important there, and classical general relativity cannot predict what will happen.
Infinite space time curvature and infinitely strong gravitational forces is just another way of saying, the values we would take of the curvature and gravitational forces are at a value right now, but over time that value will increase, so the value is not finite?
originally posted by: KrzYma
originally posted by: dragonridr
originally posted by: KrzYma
originally posted by: dragonridr
reply to post by poet1b
What is force ok ill play its the push or pull on an object from interaction with another object. Are you playing with definitions again we all know you like to do that?
this is the result of force not what it is !
what is force two electrons exchange with each other ?
(ups... question could be a hint )
You dont even know what definiton your looking for see your looking for exchange force not force the two are different. Well the exchange force is a photon between two electrons which generates a magnetic field. See electromagnetic forces are carried through the photon. I have a feeling you weren't aware of this so im guessing you believe differently. As i told you dont get into particle physics unless you have the background.
yea, I was afraid you will say that... like always, no answer just repeating nonsense is all you are doing.
Question is, how one charge knows the existence of another charge?
You tell me, another construct out of nowhere, the photon is responsible for that behaviour.
So how is the photon carrying the information ??
What is the photon other than a mathematical construct to describe something nobody knows how it works. Speculations over speculations and just adding more unknown to the formula.
Giving it a name does not make it real or explains the true real world.
Physicist simply don't know
Look, you try to explain something you really really don't understand.
Your definition of Force is a result and not cause, therefore completely irrelevant as proof of anything and even the worse explanation of what a force is and how it is transferred from one charge to another.
The same thinking error for gravity.
Mass causes the space-time to bend and this bend in space-time is causing the gravitational effect.
So how exactly is mass responsible for the bending if this bending of space is the Gravity itself ?
Now, physicist look for another mathematical construct such as the Higgs particle only to find out, and I'm sure it will come like this, Higgs particle need another type of particle to work with, so the search will begin again.
So you are telling me simple said that, electric field is transferring "photons" to carry the forces between particles, for what do you need this particle in the first place ?!?!, there is already a field as transfer medium !
The electric field itself is the driving "force" there is no force carrying photon needed in this.
"Photon" is also a misleading name as it relates to the EM radiation
originally posted by: Arbitrageur
a reply to: ErosA433
a reply to: mbkennel
a reply to: dragonridr
originally posted by: poet1b
It was my opinion decades ago, that if there is such a thing as a black hole, then one was probably at the center of the Milky Way, long before this became a popular idea., but I am still skeptical that there is such a thing as a black hole.
I have a proof of the inevitability of certain types of supermassive black holes that dosn't rely on relativity. Scientists probably don't waste their time writing up proofs for relativity deniers but I came up with this idea for a black hole proof for relativity deniers when reading about NCG1277, more about that in a bit. So here is my proof of the inevitability of black holes without using relativity, just basic gravity theory.
1. We know the Earth exists. Density is maybe 5.513 g/cc which is about 5.5 times as dense as water.
2. We know gravity pulls objects together. We see objects of many different masses and hypothetically the mass of an entire galaxy could be pulled together by gravity
3. Take 611 trillion Earth-like objects, each with same mass and density as Earth, and allow gravity to pull them together into one object.
4. Make a naive assumption that gravity will collapse the spaces between the spheres and create one giant sphere with average density of 5.5 g/cc, same density as Earth (more realistically, gravity would collapse the object into something more dense)
5. The escape velocity of this object will be the speed of light at the surface.
This proves that the concept of a black hole is inescapable if you have enough mass, even without relativity.
originally posted by: Arbitrageur
a reply to: KrzYma
Nobody is expecting you to believe a theory of quantum gravity, because there isn't one. That is the theory that's expected to cover black hole theory where relativity breaks down in a singularity.
But there is certainly plenty of evidence for theories of relativity and quantum mechanics which work pretty well with a couple of exceptions like the black hole singularity, and they work way better than EU "theory" which isn't even a scientific theory.
Actual humans know how photons work, as in what they do, a heck of a lot better than they know almost anything else in the Universe works. They know very very very very well.
originally posted by: KrzYma
please tell me what you mean saying photons and humans knowing how photons work.
All I see they can beautiful describe mathematically what they think they observe but not how it works.
originally posted by: mbkennel
Composed "of", no. That particles can be transformed into others with Standard Model interactions, yes. The particular behaviors of certain black holes are not fully predicted by physics since there is not a generalized unification of general relativity and Standard Model that is accepted and experimentally justified.
No. "infinite space-time curvature" is a way of saying that the classical physics model isn't going to work in certain limits and there will be some physical property which eliminates the infinity.
originally posted by: mbkennel
originally posted by: KrzYma
please tell me what you mean saying photons and humans knowing how photons work.
All I see they can beautiful describe mathematically what they think they observe but not how it works.
How would you, or anybody else, know the difference?
Please give a definition other than "my gut likes X and not Y".