Explanation of changing particles within a blackhole

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SUMMARY

The discussion centers on the phenomenon of particle-antiparticle interactions near black holes as described in Stephen Hawking's "A Brief History of Time." Specifically, it addresses how particles can enter a black hole while their antiparticles are ejected into space, a process linked to virtual particle pairs created at the event horizon. When a positive particle falls into the black hole, it can transform into a negative particle, effectively resulting in the black hole appearing to emit a particle. This process highlights the complex dynamics of black hole physics and quantum mechanics.

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  • Understanding of quantum mechanics principles
  • Familiarity with black hole physics
  • Knowledge of virtual particles and their behavior
  • Basic concepts of event horizons in astrophysics
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Astronomy enthusiasts, physicists, students of quantum mechanics, and anyone interested in the intricate behaviors of black holes and particle physics.

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I am currently reading A Brief History of Time and after reading chapter 7 there are still concepts which I do not understand.

Hawking explains that particles go into black holes while antiparticles are thrown outwards into infinity. How and why does this happen?

He also goes on to explain that when a particle goes into a black hole (ie. a positive particle) the black hole can change it into a negative particle. How does this happen specifically?
 
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If a virtual particle pair is created near the black hole's event horizon, either of the two particles may fall into the black hole, just by chance. The other may escape to infinity if its initial trajectory was just right.

Since before this event you have just a black hole by itself, and afterwards you have a black hole + a particle, it is exactly as if the black hole emitted the particle.

- Warren
 

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