Quote:
On 2002-03-03 06:44, informant wrote:
There is still something that I don't understand.
Some people claim that there cannot be "real" black holes in the universe because it would take an infinite amount of time - in the outside, normal space - for the singularity to form. Since the age of the universe is generally assumed to be finite, no such infinite amount of time has ever gone by. Therefore there are no real black holes in the universe.
(I hope I got this right...)
My question is: if there can't be any real black holes in the universe - only objects *on the verge of becoming* black holes, after an infinite amount of time -, then a micro-black hole would never actually form, and thus it would never actually evaporate.
Am I right, or am I way off track?...
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I'm not sure but your question may really be about the different observers.
Consider an observer far away from a black hole. The observer sees the matter falling into the black hole slow down and eventually stop at the event horizon. Time dilation between the event horizon and the far away observer becomes infinite. In other words, to the far away observer time appears to stop at the event horizon. This effect, where all incoming matter appears to stop and collect at the event horizon, has let some scientist to call black holes as "cosmic junkyards".
Now consider an observer falling into the black hole. This observer would not notice anything special as he or she passed the event horizon. The observer just keeps falling and falling.