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"George, Stuart" wrote: > > --=====================_77367437==.ALT > Content-Type: text/plain; charset="us-ascii"; format=flowed > > Hi > > Is there in principle no objection to lowering a space elevator cable into > a black hole ? > > As I understand it, objects or persons passing the event horizon have no > knowledge of such a transition, yet where they part of a space elevator > they might get cold feet when they see (see ?) what is below and elect to > return via the elevator cable to their home base. > > Goodness knows from what the elevator cable might be constructed. Lower the unobtainium cable! Lower it at an $\epsilon$ short of lightspeed if you like. How long will it require for an external observer to see it finally penetrate the event horizon? You cannot peform your experiment until you've threaded the event horizon. You cannot thread the event horizon in a finite time interval as viewed by an external reference frame. No conundrums obtain. -- Uncle Al http://www.mazepath.com/uncleal/qz.pdf http://www.mazepath.com/uncleal/eotvos.htm (The parity Eotvos experiment is queued)