5 ms·

You would see the end of the universe. Due to the extreme time dilation you would see nothing interesting in the black hole itself (things in front of you would

by ars 3y ago

You would see the end of the universe. Due to the extreme time dilation you would see nothing interesting in the black hole itself (things in front of you would appear frozen in time and unmoving), but the universe outside would experience its entire lifetime as you fell in. You'd have a hard time seeing any of it with your eyes though because light would be dramatically blue (the outside) and red (the inside) shifted. Additionally items on the inside would be so dim as to be invisible (the time dilation means the light emission also slows down, so you would see nothing). The universe though, would blast you with all of its light at basically the same time, and would be incredibly bright.

gigatexal 3y ago
Even crazier if I angled / timed it right (time and space switch spaces so yeah I dunno how that works) I could maybe make the ringularity and who knows what's on the other side. Michio Kaku thinks it'd be a portal to somewhere else -- a wormhole of sorts -- maybe I'd finally know if the other end of a spinning blackhole is a whitehole somewhere else.
- gigatexal 3y ago
  Roy Kerr has a new paper out claiming the singularity as we know it doesn’t exist. https://youtu.be/HRir6-9tsJs?si=I0Uhd4s3KMNqSC_u https://youtu.be/HRir6-9tsJs?si=I0Uhd4s3KMNqSC_u https://arxiv.org/pdf/2312.00841.pdf https://arxiv.org/pdf/2312.00841.pdf
raattgift 3y ago
Timelike freefallers in black hole metrics do not see the infinite future because the light entering the BH with them (and behind them) is also in free-fall. Accelerated timelike observers inside a black hole can't accelerate for long. Inside the horizon, you won't see light that has already been further in than you are. Likewise, you can't send light to anything with is further out than you. Except that in inside regions of some BHs -- spinning ones, notably -- you can send signals on interesting orbits and might contrive a way to communicate with another inside-the-black-hole observer. This was basically what Roy Kerr's recent no-signularity paper deals with (substituting density for "you" and the other observers and pressure for communication). Pressure, spin, and contact forces could (if Kerr is correct) come into some equilibrium that supports a nonsingular configuration of matter against further inward migration, accelerating it outwards "forever", much as contact forces within the Earth accelerates you "forever". In that case if you could stand on that matter (the enormous surface gravity would squash you very very very very flat), you would see a significant blueshift of infalling light.

by ars 3y ago

gigatexal 3y ago

Even crazier if I angled / timed it right (time and space switch spaces so yeah I dunno how that works) I could maybe make the ringularity and who knows what's on the other side. Michio Kaku thinks it'd be a portal to somewhere else -- a wormhole of sorts -- maybe I'd finally know if the other end of a spinning blackhole is a whitehole somewhere else.

gigatexal 3y ago
Roy Kerr has a new paper out claiming the singularity as we know it doesn’t exist. https://youtu.be/HRir6-9tsJs?si=I0Uhd4s3KMNqSC_u https://youtu.be/HRir6-9tsJs?si=I0Uhd4s3KMNqSC_u https://arxiv.org/pdf/2312.00841.pdf https://arxiv.org/pdf/2312.00841.pdf

raattgift 3y ago

Timelike freefallers in black hole metrics do not see the infinite future because the light entering the BH with them (and behind them) is also in free-fall. Accelerated timelike observers inside a black hole can't accelerate for long. Inside the horizon, you won't see light that has already been further in than you are. Likewise, you can't send light to anything with is further out than you. Except that in inside regions of some BHs -- spinning ones, notably -- you can send signals on interesting orbits and might contrive a way to communicate with another inside-the-black-hole observer. This was basically what Roy Kerr's recent no-signularity paper deals with (substituting density for "you" and the other observers and pressure for communication). Pressure, spin, and contact forces could (if Kerr is correct) come into some equilibrium that supports a nonsingular configuration of matter against further inward migration, accelerating it outwards "forever", much as contact forces within the Earth accelerates you "forever". In that case if you could stand on that matter (the enormous surface gravity would squash you very very very very flat), you would see a significant blueshift of infalling light.