High School Conundrum thinking about crossing an Event Horizon

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A free-falling observer crossing an event horizon (EH) cannot detect the crossing due to the lack of local consequences, as they experience no unusual effects. While they may lose communication with outside observers, they cannot identify the EH's location without prior knowledge of their trajectory or external markers. Observations indicate that light from stars may appear redshifted for infalling observers, contradicting some claims of blueshift. The discussion also touches on the complexities of Doppler effects and gravitational influences on light as one approaches the EH. Ultimately, the consensus is that while crossing the EH is a well-defined event in spacetime, the infalling observer has no local means to perceive it.
  • #31
Exidor said:
You don't know if the rules apply inside a black hole.

If the rules don't apply, we can't say anything at all, which makes discussion pointless. So as a basis for discussion here, we're assuming the same rules apply inside a black hole that apply outside. No other basis for discussion is practical.

Exidor said:
And what about tachyons? Some people think they exist. Quantum entanglement?

All of these are irrelevant to this discussion. Please stick to the topic of the thread.
 
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  • #32
Close mindedness makes discussion pointless also.
 
  • #33
Exidor said:
Close mindedness makes discussion pointless also.
Agreed. (yours, not ours). Thread is closed.
 
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