Gravity's Magic

[Dipanjan Maitra]

No.Thanks a lot for that question though! It made me read that chapter
again. What Hawking says is this:

What happens when the mass of the black hole becomes extremely small is not
quite clear, but the most reasonable guess is that it would disappear
completely in a tremendous final burst of emission, equivalent to the
explosion of millions of H-bombs.

Hawking also says that when a mass 'falls' into a black hole, the mass of
the black hole increases but the equivalent of that mass is returned to the
universe in the form of radiation. so that if an astronaut falls he will be
'recycled'!
Hawking also talks about entropy and the second law of thermodynamics in
that chapter.

On Thu, May 10, 2012 at 11:54 PM, Jude Bloom <jude at bloomradio.com> wrote:

> But his point is that they don't 'disappear,' right? They slowly radiate
> out all the stuff taken in. Or am I remembering wrong.
>
>
>
> On May 10, 2012, at 12:48 PM, Dipanjan Maitra <
> dipanjan.hauntedinkbottle at gmail.com> wrote:
>
> Hawking in fact argues that *black holes* can disappear thanks to what he
> calls 'Hawking Radiation'. It's in that chapter called 'Black Holes Ain't
> so Black' of *A Brief History of Time.*
>
> On Thu, May 10, 2012 at 10:49 PM, Keith Davis <kbob42 at gmail.com> wrote:
>
>> If matter is being sucked into black holes, and the universe is
>> expanding, the matter must be coming back out somewhere, or new matter is
>> being produced, or the matter present must be "thinning out".
>>
>> Anybody have any answers?
>>
>>
>> On Thu, May 10, 2012 at 11:15 AM, David Morris <fqmorris at gmail.com>wrote:
>>
>>> > From: Prashant Kumar <p.kumar at physics.usyd.edu.au>
>>> >
>>> > Subject: Re: Gravity's Magic
>>> >
>>> > That's what a singularity is. A point in space in which the force due
>>> to gravity is infinite.
>>>
>>> I trust Prashnat knows whereof he speaks, even though the concepts are
>>> difficult to follow, probably partly due to the limits of terminology.
>>>
>>> I've always wondered about the limits of black holes.  I take it some
>>> are larger than others (or am I wrong?).  So that implies infinite
>>> gravity contained within a physically limited size, right?  I ask,
>>> because I've never been able to understand why all the cosmos hasn't
>>> been engulfed by the first black hole that popped into existence.  Why
>>> isn't the Universe contracting into a black hole instead of continuing
>>> to expand?
>>>
>>> Probably way to complex for a simple answer...
>>>
>>> David Morris
>>>
>>
>>
>>
>> --
>> www.innergroovemusic.com
>>
>
>
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