I know someone or something sucked into a black hole could not survive, but is the bending of light so immense that an observer falling into a black hole will be able to witness any future events in the universe? That would definitely be cool :D I have a feeling this won't work though... so could you explain in detail why? Thanks.
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$\begingroup$ Hello? This question is over 3 years old. Plus, that other question is almost a year newer than this one. Check the dates next time, please. $\endgroup$ – Timtech Nov 8 '16 at 18:28
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2$\begingroup$ Timtech, it's fine to do so if the newer question has answers (especially if they're much better answers); see this Meta post $\endgroup$ – HDE 226868♦ Nov 8 '16 at 18:41
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$\begingroup$ First off, these are significantly different questions. Plus, my answer (score 9) was suddenly deleted by some moderator. Is there a necro delete going on or something? Can't find enough work to do with newer questions, so you have to revisit older ones? $\endgroup$ – Timtech Nov 8 '16 at 19:14
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$\begingroup$ @Timtech I am not omniscient. I rely on the community's help to moderate. When the community flags a post that is in violation of the community rules ("Quote only the relevant portion" "Do not copy the complete text of external sources; instead, use their words and ideas to support your own. And always give proper credit to the author and site where you found the text, including a direct link to it."), it is my job to request that it be amended--and if it is not in a timely manner, to delete it. $\endgroup$ – called2voyage♦ Nov 9 '16 at 14:23
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$\begingroup$ @Timtech Also, if you have been targeting downvotes, be aware that these are tracked in the system and will be dealt with. $\endgroup$ – called2voyage♦ Nov 9 '16 at 14:23
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The confusion about finite or infinite time dilation at the Schwarzschild radius began since Karl Schwarzschild in 1915 used a space-time coordinate system where coordinate time went to +∞ when a falling object approached the Schwarzschild radius. But t → +∞ for a world line that approaches the horizon is a thing different from t → +∞ far from the black hole. An object that is about to cross the horizon is in no position to synchronize clocks with an outside world.
No, completely opposite situation to the OP’s expectations. If a falling observer will transmit a powerful beam of light out of the hole, then photons will reach increasingly far future of the exterior universe. But the future seen by the falling observer will be very limited; see http://jila.colorado.edu/~ajsh/insidebh/penrose_schw.html for graphic depiction.
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$\begingroup$ The only people who are still confused about the difference between coordinate and true singularities are at most beginning students. So it is not clear about who s confusion the first sentence talkes about; working physicists can not be meant. $\endgroup$ – Dilaton Aug 25 '14 at 23:18
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$\begingroup$ @Dilaton: some people trying to understand black holes become confused. And not necessarily about “coordinate singularity” in Schwarzschild’s coordinates, but generally about clock synchronization with a falling object. I do not see how your comment about supposed “working physicists” is helpful. $\endgroup$ – Incnis Mrsi Aug 27 '14 at 7:03
