re the universe and black holes was re years in article apr iastate edu kv iastate edu warren vonroeschlaub wrote in article r hj inn c gap caltech edu keith cco caltech edu keith allan schneider writes 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 that s kind of what i meant to be more precise given any observer in any single position outside the event horizon would that observer ever in any way be able to detect the probe having crossed the event horizon yes unless the observer is at rest with respect to the singularity at infinite distance away but an observer on a close approach to the bh will see the particle go in in finite time peter don t forget to sing they say there s a heaven for those who will wait some say it s better but i say it ain t i d rather laugh with the sinners than cry with the saints the sinners are much more fun only the good die young
