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Physics
Special and General Relativity
Temporal Gradients at Event Horizons of Black Holes
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[QUOTE="Kostik, post: 6415368, member: 568614"] [B]TL;DR Summary:[/B] Does the temporal gradient in the immediate (external) vicinity of an event horizon of a black hole result in "fossilization" of any object with non-zero size crossing the event horizon? While there is much discussion about "spaghettification" when approaching a black hole (BH) singularity due to tidal forces, many discussions say, rather casually, that a hypothetical traveler would free-fall right through the event horizon (EH) of a large BH without noticing anything. Doesn't this scenario ignore the [B][I]temporal gradient[/I][/B] at the EH? Specifically, to any observer outside the EH, a clock approaching the EH appears to slow down. And from the point of view of a traveler approaching the EH and looking backward (in the direction opposite to which he is moving), a clock located a fixed distance from the EH appears to [I]speed up. [/I]Therefore, if a real traveler (say a six-foot human) approached the EH -- suppose oriented head-first along his trajectory -- wouldn't he see his feet age a million years in a split-second? In other words, a clock attacked to his feet would be running much faster than a clock attached to his neck. Won't this [B][I]"temporal tide"[/I][/B] essentially fossilize (i.e., infinitely age) anything larger than a point-particle as it approaches the EH? So it seems to me that the real unpleasantness of entering a black hole is not the physical spaghettification near the singularity, but the "temporal fossilization" near the EH. Is this right? [/QUOTE]
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Physics
Special and General Relativity
Temporal Gradients at Event Horizons of Black Holes
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