Discussion Overview
The discussion revolves around the nature of black holes, particularly focusing on their growth mechanisms and the implications of gravitational time dilation. Participants explore theoretical concepts related to black hole event horizons, the ingestion of matter, and the potential internal structure of black holes.
Discussion Character
- Exploratory
- Debate/contested
- Technical explanation
Main Points Raised
- One participant argues that black holes cannot grow by "ingestion" due to gravitational time dilation, suggesting that no particle with mass can reach the event horizon.
- Another participant challenges this claim, stating that an infalling particle will reach the horizon in a finite time according to its own clock, thus disputing the assertion that mass cannot cross the event horizon.
- The first participant proposes a model where black holes could consist of multiple event horizon shells, each partitioning their contents from the accessible universe, which could allow for a complex internal structure.
- The second participant refutes the idea of multiple event horizons, asserting that a black hole has a single event horizon and that merging black holes result in a single horizon.
- The first participant suggests that the concept of Hawking radiation could lead to inner shells becoming visible again, potentially addressing the "missing data" conundrum.
- Discussions include the implications of crossing the event horizon, with one participant questioning the narrative that passengers would not notice crossing it, while the other clarifies that local observations would not indicate this crossing.
Areas of Agreement / Disagreement
Participants express differing views on the mechanisms of black hole growth and the nature of event horizons, with no consensus reached on these points. The discussion remains unresolved regarding the internal structure of black holes and the implications of gravitational effects.
Contextual Notes
Participants reference the Schwarzschild time coordinate and its implications, but there are unresolved assumptions regarding its physical meaning and the nature of event horizons. The discussion also touches on the concept of the infinite mass paradox without a clear definition provided.