Are Black Holes Hot? A Deeper Look

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Discussion Overview

The discussion revolves around the thermal properties of black holes, specifically whether they can be considered "hot" due to the extreme conditions surrounding them. Participants explore concepts related to gravity, matter, and energy in the context of black holes, including the behavior of matter near the event horizon and the implications of gravitational singularities.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that black holes might be hot due to the immense gravitational forces and energy from matter being crushed together, suggesting friction as a source of heat.
  • Others argue that black holes are not hot because their strong gravitational pull prevents heat from being defined in conventional terms, and they may convert heat into mass energy.
  • A participant questions the fate of matter that crosses the event horizon, indicating uncertainty about the conditions inside a black hole.
  • One contributor expresses skepticism about the concept of heat in black holes, suggesting that if heat is related to molecular movement, then the extreme gravity might imply a temperature of absolute zero (0K).
  • Another participant notes that while the interior of a black hole is poorly understood, the accretion disc outside could generate significant heat due to matter colliding and spiraling in.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether black holes can be considered hot. Multiple competing views remain regarding the nature of heat and matter in and around black holes.

Contextual Notes

Limitations include the unclear definitions of heat in the context of black holes, the unresolved nature of matter's behavior beyond the event horizon, and the dependence on theoretical models that may not fully capture the phenomena involved.

Cbray
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I was wondering if black holes are insanely hot, my guess is they are because so much matter has been crushed together causing friction and energy.
Is this right? Thanks.

PS: if it's something a 14 year old wouldn't understand, please give me a url link to wikipedia where I can study it, thanks, bye!
 
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they r not hot bcs they have huge gravitation and they can also change the hit to the mass energy
 
Cbray said:
I was wondering if black holes are insanely hot, my guess is they are because so much matter has been crushed together causing friction and energy.
Is this right? Thanks.

This happens to material the approaches the event horizon of a black hole.
 
So no one actually knows what happens to the matter once it goes inside the black hole?
 
I don't know but I'm just giving my amateurish thought on the subject.

I don't think there is an answer to your question because, as you suspect, we don't know.

If heat is movement of molecules, I don't see how they could move at all in a black hole if they were so tightly held together by gravity. Could that mean that black holes are precisely 0K ? I don't know...and not sure if anyone does.
 
Beyond the event horizon all bets are off for determining what is really going on. Contemporary understanding is that beyond an event horizon is a gravitational singularity, this is a point of infinite density. Notions like heat don't really apply.

Outside the black hole an accretion disc can form, this is a spinning disk of matter that is spiralling into the black hole. All that matter smashing together is likely to cause a lot of heat.
 

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