Recent content by Tim13

If something can be slowed, then perhaps it may also be stopped? Perhaps the properties of light (its duality of wave and particle) are reactive based on environmental conditions? Is the particle nature more dominant in super cooled states and hence the light slows? Is the word "dominant" not...

Your help is much appreciated. Thanks.

I understand and agree with you at a certain level. I guess it is somewhat irrelevant how the apparent coldness is caused. But is it possible that the black hole draws something hot towards the black hole not because the black hole is colder but because it warps space/time? And isn't it...

Has there been a previous thread that discusses how light can be slowed? Thanks, Tim13

I really wasn't referring to the region right outside of the black hole. Perhaps part of the problem is the phrase "black hole" which can mean different things to different people. I understand (perhaps mistakenly) the phrase to mean only the actual supermassive body beyond the event horizon...

I suppose you are right. There is no particular reason why the mass of millions of suns (equal to a supermassive black hole) when compressed to a tiny volume would get hot. It is probably cold enough to make ice cream.

If it really emits no energy (in this universe) then isn't it like a one way street to a different universe? I apologize if that is too speculative for this forum. But the problem I have conceptually or intuitively is that we know a black hole exists from the effect of its gravity and yet we...

I apologize that I didn't read it more thoroughly earlier. I would have saved myself and others from unnecessary key strokes. Is there a collection of such expositions for different topics on this website?

I confess that I only skimmed it and didn't fully understand the exposition at the link you gave. I just now went back and reread it. It does a much better job of explaining the potential confusion created by the analogy than what I was attempting to convey. I initially misunderstand the...

That is probably what he meant. Yet if he believes that space is relatively flat but not strictly 2D (perhaps Euclidian and 3D) then it only adds more evidence that the balloon analogy is potentially misleading for numerous reasons. Plus, my question was a little more nuanced. I was...

Hmm. I apologize. I am not sure I understand your point. However I think your point may only add to mine in that the balloon analogy is potentially misleading. Obviously a real balloon is a 3D object and so if it was intended to be a 2D analogy for the universe then I did misunderstand...

I don't accept this explanation by Hawkins. Any household appliance sucks up energy. All household appliances radiate energy. Temperature of a BH shouldn't be "associated" or "assumed" to be based on energy absorbed without any reference to energy radiated. Am I missing something...

Really? It may seem like particle accelerators create matter but isn't it really just the transfer of energy? Doesn't the law of conservation allow for the transfer of energy to matter and vice versa?

I get the analogy of a glass of ice water but it is a non-sequitor. The BH absorbs energy due to gravity not temp or is that wrong?

Nt sure tht is an answr. If yu re syng that the tmperatre of a blck hole is not measurable because electromagnetic radiation can't escape the event horizon - then how does that mean that a supr masive blck hle is cld? If it is nt measurable, homework is it ether cld or ht??