Re: black hole is an oximoron

solar plexus:
>Bilge wrote:
>> solar plexus:
>> >the light pass (okay, bended) near a
>> >very big star (a lot of mass)
>> >
>> >then suddenly, the same very big star
>> >colapse into a black hole
>> >
>> >now the same light cant pass near the
>> >same (now collapsed) star anymore just
>> >because the black hole have so big
>> >a mass that not even the nearby light
>> >can escape
>>
>> That isn't correct. The radius of the sun, for example is
>> 6.97 x 10^8 meters. If it collapsed into a black hole, it would
>> have a radius of about 1600 meters. Light that could pass by
>> the sun before it collapsed (i.e., at a radius > 6.97 x 10^8
>> meters), would pass by the black hole in exactly the same way
>> at that distance.
>>
>> >
>> >where does the surpluses mass came from?
>> >
>> >only answers from phds are accepted
>> >
>
>i apreciate your answer, thanks
>
>let me reformulate
>
>is there for sure that a collapding star
>gives form to an event horizon ?

If the star is massive enough, general relativity predicts that
it must collapse. Electron degeneracy is not sufficient to prevent
a star with a mass larger than the chandrasekhar limit cannot from
collapsing to neutron star (about 1.4 solar masses). If the mass
exceeds about 3 solar masses, the neutron degeneracy cannot prevent
further collapse. It is assumed that the collapse is to a black hole,
however, it's possible that there exist further intermediates.
A star composed of \lambda's rather than neutrons would be stopped
from collapse by the degeneracy of the \lambda's. However, even then,
there would be a mass limit, beyond which the \lambda degeneracy
is insufficient to prevent further collapse. One could speculate
stars composed of still heavier neutral baryons, however, for
reasons I don't understand (and are possibly not correct), stars
composed of particles heavier than \lambda's are not supposed to
be possible. In any case, at some point, nothing can stop the collapse
and the generally accepted number for that is about 3 solar masses.


.

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