4 ms·

There is no disconnection between the interior of the black hole and the exterior. They are smoothly and continuously connected, and the “normal” axis of time b

by db48x 2y ago

There is no disconnection between the interior of the black hole and the exterior. They are smoothly and continuously connected, and the “normal” axis of time blends seamlessly with the “bent” axis of time inside the black hole. That’s why orbits are so weird outside the black hole. You’re simply wrong about this.

Jensson 2y ago
So how long does it take for a thing to enter the singularity as seen from our reference frame? If you say there is no way to answer it, then you say that I am right, so I'd like to see a link to a formula saying how long that takes from our point of view. I studied up to a masters in physics, I've seen the math, I don't believe there is a way to calculate that, there is no way to compare time inside with time outside. Edit: I'd love to see such a formula if there is one btw, so if you know there is one please link!
- qubitcoder 2y ago
  I'm not sure what you mean by "enter the singularity". Once an object has crossed the event horizon, its light rays can no longer reach us. From an outside perspective, the time required would be based on the object's orbit and when it intersected with the event horizon. When you say "thing", it's more like photons. While thought experiments of a diver falling into a black hole are fun to ponder, nature isn't so gentle. The corona, tidal forces, magnetic fields--and other factors--would obliterate matter into a stream of subatomic particles and light before crossing the event horizon. So the concept of a "thing" moving inside a black hole is likely misguided. It’s been called one of the most extreme physical environments in the universe. Strong magnetic fields threading the inner accretion disk extend out of it, creating a tenuous, turbulent, billion-degree cloud. Particles in the corona orbit the black hole at velocities approaching the speed of light. It’s a source of X-rays with much higher energies than those emanating from the accretion disk, but astronomers are still trying to figure out its extent, shape, and other characteristics. [0] NASA provides a fantastic overview here [0]. A few resources to check out: Sean Carrol, PBS Space Time, Ask a Spaceman, and Why this Universe are all great resources--and frequently do deep dives into this topic. [0] https://science.nasa.gov/universe/black-holes/anatomy/ https://science.nasa.gov/universe/black-holes/anatomy/

by db48x 2y ago

Jensson 2y ago

So how long does it take for a thing to enter the singularity as seen from our reference frame? If you say there is no way to answer it, then you say that I am right, so I'd like to see a link to a formula saying how long that takes from our point of view. I studied up to a masters in physics, I've seen the math, I don't believe there is a way to calculate that, there is no way to compare time inside with time outside. Edit: I'd love to see such a formula if there is one btw, so if you know there is one please link!

qubitcoder 2y ago
I'm not sure what you mean by "enter the singularity". Once an object has crossed the event horizon, its light rays can no longer reach us. From an outside perspective, the time required would be based on the object's orbit and when it intersected with the event horizon. When you say "thing", it's more like photons. While thought experiments of a diver falling into a black hole are fun to ponder, nature isn't so gentle. The corona, tidal forces, magnetic fields--and other factors--would obliterate matter into a stream of subatomic particles and light before crossing the event horizon. So the concept of a "thing" moving inside a black hole is likely misguided. It’s been called one of the most extreme physical environments in the universe. Strong magnetic fields threading the inner accretion disk extend out of it, creating a tenuous, turbulent, billion-degree cloud. Particles in the corona orbit the black hole at velocities approaching the speed of light. It’s a source of X-rays with much higher energies than those emanating from the accretion disk, but astronomers are still trying to figure out its extent, shape, and other characteristics. [0] NASA provides a fantastic overview here [0]. A few resources to check out: Sean Carrol, PBS Space Time, Ask a Spaceman, and Why this Universe are all great resources--and frequently do deep dives into this topic. [0] https://science.nasa.gov/universe/black-holes/anatomy/ https://science.nasa.gov/universe/black-holes/anatomy/