re the universe and black holes was re years salem pangea stanford edu bruce salem writes is this zeno s paradox no zeno s paradox is resolved by showing that integration or an infinite series of decreasing terms can sum to a finite result nothing can get out of a black hole because the escape velocity is the speed of light i don t know how time dialation can prevent matter spiraling in from getting to the event horizon can any one explain how matter gets in well suppose a probe emitting radiation at a constant frequency was sent towards a black hole as it got closer to the event horizon the red shift would keep increasing the period would get longer and longer but it would never stop an observer would not observe the probe actually reaching the event horizon the detected energy from the probe would keep decreasing but it wouldn t vanish exp t never quite reaches zero i guess the above probably doesn t make things any more clear but hopefully you will get the general idea maybe keith
