41–50 of 164 posts
Most of theoretical science and science fiction is complete bullshit. They use some analogy and run with their wild imagination to create anything utterly non nonsensical. The space time fabric etc is just an analogy to avoid people from the real mathematical equations of relatively and what people did with it created whole shit load of theoretical science around that analogy.
Articles like these are great reminders to question everything you think you know.
I had thought that upon reaching the event horizon the outside observer sees time 'stand still' because no light from your continued motion the other side of the event horizon can reach them, effectively freezing the observers view. Or thought of another way, the curvature of spacetime at the event horizon reaches the equivalent velocity of c due to the extreme warping of spacetime, so light can't escape and 'time' stops for the observers view of the freefaller because light can't get to them, the freefallers then image freezes and slowly fades.
Special relativity says the relativity of simultaneity is pronounced at high % of c, would it not be pronounced in an extreme gravitation field? A gravitational field is equivalent to acceleration so...
If the curvature of spacetime at the event horizon has an equivalent velocity inwards of c, thereby preventing light escaping, would this not lead the outside observer to see one thing and the freefallers to experience another which special relativity's relativity of simultaneity explains?
I say this becaue the light cone escaping the black hole must experience high gravitational fields (i.e equivalence principle) and the free faller continues on their geodesic experienceing 'no' force (save for tidal forces which in the case of a large black hole won't spegetify them just yet).
So the _outside_ observer is seeing the effect of the freefaller and the freefallers observable light cone experiencing the equivalence principle which necessarily would cause relativity of simultaneity to become more pronounced. At the event horizon, with an equivalent spacetime curtavure of velocity c, surely this would mean that the outside observer would see no more regardless of what the freefaller observs and all that would be accounted for by relativity of simultaneity.
I guess I thought of it as applying relativity of simultaneity to a gravitational field (by way of the equivalence principle) and not just velocity as the train thought experiment did.
Is this line of reasoning incorrect - I'm assuming it is - why?
Articles like these are great reminders to question everything you think you know.
They are also useful in questioning the validity of what the author has written.
Earlier quoted context omitted.
The theory very explicitly does not posit a "split in realities" or "parallel universes" or anything of the sort. It says there is quantum information both inside the black hole and outside it, and this is ok because they're supposedly causally disconnected from one another.
> The instant you entered the black hole, reality would split in two. From the 3rd paragraph. However, yes the alternate universe comes into existence when you reach the singularity. Still, if you can exist both inside and outside, then your ashes can exist in both places alongside living you without causing a paradox because you simply will not exist in the same space as you ashes that will arrive very much later an…
Ah, I'd assumed this meant that "you" would split in two, both copies being "in the same universe". I don't know enough about the physics to know which is meant.
Earlier quoted context omitted.
There aren't any stable orbits within the event horizon of a black hole (due to General Relativity): https://en.wikipedia.org/wiki/Schwarzschild_metric#Orbital_m...
Not so, only one of the two solutions is unstable: https://en.wikipedia.org/wiki/Schwarzschild_geodesics#Circul... Also, this applies only to circular orbits, and does not indicate that a powered ship could not maintain orbit.
You can only get inside black hole after time ends. That's because universe-time stops at the horizon. The moment you fall in, Anne is dead eternally long ago. Also, you are incinerated by a billion years of starlight per your second, including energetic particles I guess. You will observe the end of universe and death of everything in it before diving.
Nonsense. By this logic, if you cross the event horizon feet-first, your head will have died of old age before it gets inside!
This is just like one of those miller lite ads where somebody smacks a beer bottle on the table and on the TV they see a mix of dog racing and bikini mud wrestling.
The trouble is that it is so hard to get established that the field is dominated by old fogies; as a kid in the 80s I was aware of this contradiction but it was censored from the physics literature. Instead the greybeards were worried about the information paradox which turned out to be no paradox at all.
You can only get inside black hole after time ends. That's because universe-time stops at the horizon. The moment you fall in, Anne is dead eternally long ago. Also, you are incinerated by a billion years of starlight per your second, including energetic particles I guess. You will observe the end of universe and death of everything in it before diving.
> The moment you fall in, Anne is dead eternally long ago. Nonsense. By this logic, if you cross the event horizon feet-first, your head will have died of old age before it gets inside!
There is no barrier in place of event horizon, but from the POV of external observer it takes infinite time for you to dive.
Talk about the moral decay of theoretical physics... This is just like one of those miller lite ads where somebody smacks a beer bottle on the table and on the TV they see a mix of dog racing and bikini mud wrestling. The trouble is that it is so hard to get established that the field is dominated by old fogies; as a kid in the 80s I was aware of this contradiction but it was censored from the physics literature. Ins…