Freely Floating Observer Crosses Event Horizon

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SUMMARY

A freely floating observer cannot conduct an experiment that definitively indicates the moment of crossing the event horizon of a black hole. The discussion highlights that any local experiment conducted by the observer will yield results that are consistent with their previous observations, regardless of their position relative to the event horizon. This conclusion is rooted in the principles of general relativity, which dictate that the laws of physics remain unchanged in free fall, making it impossible to distinguish the crossing of the event horizon through local measurements.

PREREQUISITES
  • Understanding of general relativity principles
  • Familiarity with black hole physics
  • Knowledge of local vs. non-local experiments
  • Concept of event horizons in astrophysics
NEXT STEPS
  • Research the implications of general relativity on black hole observations
  • Explore the concept of local and non-local experiments in physics
  • Study the characteristics and effects of event horizons
  • Investigate the role of freely falling observers in gravitational fields
USEFUL FOR

Astronomers, physicists, and students interested in black hole research and the fundamental principles of general relativity.

lavinia
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Can a freely floating observer do an experiment that tells him when he is crossing the event horizon?
 
Physics news on Phys.org
Not a "local" experiment.
 

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