The discussion centers on the mechanics of black holes and their ability to absorb matter, specifically addressing misconceptions surrounding time dilation and event horizons as described by the General Theory of Relativity. Participants clarify that while time appears to slow down for external observers, infalling objects experience finite time as they cross the event horizon. The conversation emphasizes the importance of using appropriate coordinate systems, such as Lemaitre coordinates, instead of Schwarzschild coordinates, which do not adequately describe dynamic black hole growth. Ultimately, the participants assert that black holes can indeed form and grow as they attract surrounding matter.
PREREQUISITESAstronomers, physicists, and students of general relativity seeking to deepen their understanding of black hole mechanics and the complexities of spacetime interactions.
Another simple correcting argument is here:JimWhoKnew said:I want the correcting arguments to be good and valid.
PeterDonis said:False. The proper phrasing in daily language is "the observer never sees light signals from the horizon formation". But it is a simple-minded logical error for that observer to conclude that because he didn't see something, it never happened.