Do black holes evaporate or go bang ?

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Discussion Overview

The discussion centers on the nature of black holes, specifically whether they "evaporate" over time or undergo a more explosive end. Participants explore concepts related to black hole density, mass loss, and the implications of Hawking radiation, raising questions about the processes involved in black hole evaporation and the potential for explosive phenomena as they lose mass.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that black holes can evaporate due to Hawking radiation, suggesting that the rate of matter intake might exceed the evaporation rate, especially if a continuous supply of material is available.
  • Others argue that smaller black holes radiate energy away more quickly, leading to a potential runaway process that culminates in a significant release of energy as they approach the Planck mass.
  • There is a discussion about whether an evaporating black hole becomes less dense or larger, with some asserting that it actually shrinks and increases in density until it disappears.
  • One participant mentions that if a black hole loses enough mass, it could reach a threshold where the strong atomic force might cause an explosion, although this is contested and seen as confusing by others.
  • Concerns are raised about the clarity of the conditions under which a star becomes a black hole and the processes involved in black hole evaporation, indicating uncertainty in the current understanding of these phenomena.

Areas of Agreement / Disagreement

Participants express a range of views on the processes of black hole evaporation and the implications of mass loss. There is no consensus on whether black holes ultimately evaporate completely or if they might undergo explosive events, and the discussion remains unresolved.

Contextual Notes

Participants note limitations in understanding the density of black holes and the conditions under which they form or evaporate, highlighting the complexities of the underlying physics and the need for further exploration of these concepts.

  • #31


gawd.iz.life said:
What I said is that the impact that results in a neutron star "overcomes" might be a better word ("extinguishes") the weak nuclear force such that only the strong force and gravity remain. That is true, too.

No it's not. If you raise the temperature you can reach a point where the difference between the forces are not important, but if you just increase gravity that's not going to do it.

Think of it this way. If you take a chair and a cup of coffee and heat them to 10,000K, they basically behave more or less the same way. A 10,000K chair and a 10,000K cup of coffee are just going to be gases that tend to act in the same ways. The hotter you make the chair and the cup of coffee, the more similar they are going to be. At 10,000K, they still have different elements, but if you heat things to 10 million K, the chair and the cup of coffee are going to break down into protons and electrons and then they *really* start being similar.

All the talk about "force unification" is an extension to that idea.

But if you crush the chair and the cup of coffee and don't increase the temperature, they are still going to be very different.

You still have the weak nuclear force happening in a neutron star, and the weak nuclear force is *extremely* important in neutron stars since it provides the neutrinos that have something to do with blowing up the star.

If there are forces strong enough to snub out each of the 3 forces, given larger masses and more powerful implosions, why not speculate as to an event, that could also snub out gravity.

Because the *if* is as far as we know incorrect. Gravity doesn't "snub out" the other forces.
 
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  • #32


Since the above warning was not heeded, and speculation continued without evidence, it's time to close this thread.
 

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