Recent content by GR86

You must be one of the "experts" peter mentioned. You keeping posting personal insults so i guess you get a warning too? LOL What a joke, gotta love academia nowadays, filled with intellectuals who can't handle anybody challenging them.

Im not interested in the politics of pecking order. You are basically saying i shouldn't have the right to ask physics questions bc i haven't studied enough. I disagree so here i am.

So there must be a reason you said above the event horizon, not at or below it. We know gravity bends space, so objects in free fall will fall in a straight line but through curved space. But a rope being pulled is not free falling. And space and time are not separable, so as the gravity of the...

You are making a lot of assumptions when humans likely know very little about reality. Isn't that the point of theoretical discussion, to explore concepts that we can't actually physically test in real world? Not a single person KNOWS what is really going on in the depths of a black hole yet...

Im not sure why the word center keeps being used, i never mentioned center. A black hole isn't a hole as you know, in theory it is still a body of mass, likely symmetrically round. I assumed any meaningful distance measured like an event horizon, would be measured from the assumed "surface" of...

[Mentor's note - split off from a thread about the Twin Paradox] In the meantime let me ask the most simplified question i can here then. If the universe is void of all matter save two rockets and they are passing eachother at the speed of light like two cars on the freeway in opposing lanes...

But isn't that effectively what's happening, time is slower for the traveler than the one on earth? It's impossible yes but if the two twins COULD instantaneously see eachother during the trip, the twin on earth would see the traveling twin moving very slowly, and visa versa. Differences in...

I disagree, there is a non arbitrary way of defining "at the same time", it's called now. It doesn't matter the level of time dilation between two differing perspectives, now is now for both. And of course locally time passes at 1 second per second, but why would i mean that when discussing time...

I was describing the accumulation of photons, orbiting a black hole in a spherical manner, can you think of another phenomenon similar that i might have been describing? Was i just shooting darts and making stuff up and got lucky? No, i just happened to be wrong about the distance of the...

Here's another theoretical question. If you had a rope sufficiently strong and long enough, what would happen if you "lowered" the rope from a distance into a black hole, then tried to pull it back out? Lets say we go just past the event horizon with the end of the rope, how would this play out?

Ok i had never heard of the photon sphere but that's what i was describing. It would be more interesting if it were stable but i had a hunch it wasnt as any mass changes affect the gravity of the black hole.

Well the common claims we hear are that humans are producing a carbon footprint in such a way that we are heating up the earth. But how can anybody know that without acknowledging and measuring how much the earth would heat up with no humans here? We know it's happening, either heating up or...

Wow you are nearly insulting instead of simply answering me. I don't use FB or read the newspaper. If it's very common, why not just answer? It's simple, we had many ice ages and many thaws, all without humans adding our carbon footprint. If they happened thousands and millions of years in the...

So i think i understood the article. It's saying that spacetime geometry suggests it's path distance that cause the asymmetrical passage of time. I assume, meaning as the speed of light is approached, the traveling twin's perspective sees the universe compress and therefore his path is shorter...

First off, i don't know if this has been discussed by other people openly, it was just something i have wondered for a long time. OK. The event horizon marks the distance, spherically, where anything moving at the speed of light (including light), has it's escape velocity overcome. So closer...