Explanation of changing particles within a blackhole

TanIn summary, Hawking discusses the behavior of particles and antiparticles near black holes, explaining that particles can be pulled into the black hole while antiparticles are ejected into infinity. He also describes how a black hole can change a particle's charge when it is absorbed, and how virtual particle pairs can contribute to this process. This ultimately results in the black hole appearing to emit a particle, even though it is technically absorbing it.
  • #1
only_huce
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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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  • #2
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
 

FAQ: Explanation of changing particles within a blackhole

What is a blackhole?

A blackhole is a region of space with a gravitational pull so strong that nothing, including light, can escape from it. It is formed when a massive star collapses in on itself and its core becomes infinitely dense.

How do particles change within a blackhole?

As an object gets closer to a blackhole, the gravitational pull increases and it begins to stretch and deform. This process is known as spaghettification. Once the object passes the event horizon (the point of no return), it is pulled towards the singularity at the center of the blackhole, where the particles are crushed and compressed into an infinitely small point.

What happens to time and space near a blackhole?

Near a blackhole, time and space are distorted due to the intense gravitational pull. This phenomenon is known as gravitational time dilation. Time appears to slow down for an outside observer while space becomes infinitely curved near the singularity.

Can anything escape from a blackhole?

Once an object passes the event horizon of a blackhole, it is impossible for it to escape. However, some particles can escape in the form of Hawking radiation, which is a type of radiation emitted by blackholes due to quantum effects near the event horizon.

How do blackholes contribute to our understanding of the universe?

Blackholes are important in understanding the laws of gravity and the structure of the universe. They also play a crucial role in the formation and evolution of galaxies. Studying blackholes can provide insights into the behavior of matter and energy in extreme conditions, which can help us better understand the workings of the universe.

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