Black Holes and Hawking Radiation: The Time Dilation Paradox

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SUMMARY

This discussion addresses the paradox of time dilation in the context of black holes and Hawking radiation. A free-falling observer (Observer 1) crosses the event horizon of a black hole in finite proper time, while an asymptotic observer (Observer 2) perceives this crossing as taking an infinite amount of time. The conversation highlights that Observer 2 would witness the black hole evaporating due to Hawking radiation before Observer 1 reaches the event horizon, raising questions about the visual experience of Observer 1 as the black hole disappears. The discussion confirms that Observer 1 would see the universe accelerating, with the black hole vanishing before reaching it.

PREREQUISITES
  • Understanding of general relativity and black hole physics
  • Familiarity with the concept of event horizons
  • Knowledge of Hawking radiation and its implications
  • Basic grasp of time dilation effects in relativistic physics
NEXT STEPS
  • Research the mathematical framework of general relativity and its application to black holes
  • Explore the implications of Hawking radiation on black hole thermodynamics
  • Study the concept of proper time versus coordinate time in relativistic contexts
  • Investigate observational evidence for black hole evaporation and its effects on surrounding space
USEFUL FOR

Physicists, astrophysicists, and students of theoretical physics interested in the complexities of black hole dynamics and the implications of Hawking radiation on time perception.

Orbb
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I have a question concerning black holes and hawking radiation. I hope it is an adequate question and I pose it in the right section.

Consider a free-falling observer 1 approaching the event horizon of a black hole. Evaluating his proper time, one finds that he crosses the event horizon within finite time. For an asymptotic observer 2 however, the time it takes observer 1 to cross the event horizon is infinite. However, the time it takes for the black hole to evaporate due to Hawking radiation is finite. So observer 2 would see the black hole evaporate before observer 1 reaches the event horizon. Is that correct? And what would observer 1 see? The Universe, including the black hole accelerating in time so that the black hole vanishes in radiation before he can reach it?

Thank you for your answers.
 
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That answers my question perfectly, thank you very much!
 

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