B Is a Black Hole Really Just a Spherical Structure?

AI Thread Summary
The discussion centers on the nature of black holes, questioning whether they should be considered "holes" or spherical structures resulting from imploding stars. Participants argue that while the term "hole" implies an empty space, black holes are better described as spherical due to their event horizons, which are detectable yet prevent any causal connection to the universe beyond gravity. The conversation also touches on the concept of black holes as distortions in spacetime rather than physical openings, emphasizing that they do not "suck" objects in like a vacuum but can be orbited safely if one remains outside the event horizon. Additionally, the potential for black holes to grow indefinitely without an upper mass limit is highlighted, alongside discussions about their size and the implications of Hawking radiation. Ultimately, the terminology and conceptualization of black holes remain complex and nuanced.
  • #51
phinds said:
Where did you get this? What does the HUP have to do with the final black hole evaporation/explosion/whatever ?
In other words, you can't confine a black hole in atomic scale and with the relevant energy levels and have it live long at the same time! ... It will be unstable and will collapse within a matter of 0.1sec (as stootmart [based on Hawking (1974)] said earlier https://www.physicsforums.com/threads/black-hole-question.897685/page-2#post-5648676), and perhaps it's not just the Hawking radiation (evaporation) at this final stage of the BH (there may be another extra final mechanism [for the atomic scale] not clear yet ... (that brings the burst) [whose profound role, action, function and connection to the Uncertainty principle (HUP) could perhaps be explained with hidden variables, but I am not sure at this point] ).
 
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  • #52
Stavros Kiri said:
... within a matter of 0.1sec (as stootmart [based on Hawking (1974)] said earlier ...

stoomart said:
My understanding according to Stephen Hawking's 1974 letter to Nature is it's both: the black hole evaporates and then explodes in the last 0.1 second.

That shows perhaps there must be two mechanisms ...
 
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  • #53
There is only one mechanism. Hawking merely says that in the final 0.1 seconds of its life a black hole would release about 1 million megatons of energy. He could have easily said how much energy was lost in the last 0.5 seconds or 1 nanosecond or some other amount of time.
 
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