Darren New <dne### [at] sanrrcom> wrote:
> clipka wrote:
> >>> Doesn't make sense to me: We get closer to the black hole's center, and when we
> >>> have reached the EH this distance becomes *infinite*?
>
> >> Yes. for the same reason that the diameter of the earth is *greater* than it
> >> should be given its circumference.
> >
> > Don't believe.
>
> Watch. Lay a ruler across the width of a black hole, thru the middle. How
> long does the ruler have to be?
>
> That's what warped spacetime *is* - when euclidean measurements don't work.
> When the angles of a triangle add up to more than 180 degrees, you have a
> mass inside the triangle.

Do believe. Don't believe the *infinity* in your original statement.

> > Although I must confess that the above reasoning indicates that
> > it's something different than zero, and actually greater than the "expected" EH
> > radius.
>
> I think you're confusing circumference and radius and diameter.

I think I thought about them long enough and did enough sorting-out of confusion
to not having confused them in the end...

> > Eddington-Finkelstein metric even has a component called "tortoise coordinate"
>
> Is that Achillese tortoise or A-Tuin tortoise? :-)

Uh... I like to believe that it's the former ;)

(BTW, wasn't that *Great* A-Tuin?)

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