From the point of view of an external observer, it takes an infinite amount of time for an object to approach the event horizon, at which point the light coming from it is infinitely red-shifted.
英
美
- 從外部的觀(guān)察者的觀(guān)點(diǎn)來(lái)看，它為一個(gè)物體接近活動(dòng)視界獲得了無(wú)限大的時(shí)間量,自那一點(diǎn)而來(lái)的光是無(wú)限紅移的。
