JoeZ wrote:And anyway, if Narnia is a whole, separate, universe, why does it need to have time parallel to our own? Shouldn't it have its own temporal dimension? Shouldn't a portal like the wardrobe be able to bridge any points in space-time between the two worlds?
Well if they had two separate timelines, and you had control over where each portal connected to, then you could do something like go through the portal, and reorient it to point back to the past of the other world, and step back through it.
It would be less that time moves faster on one side or the other, and more just a relationship between when you entered on one side, and when you exited on the other. Say for example, entering at time x on one side, would always result in ending up at time y on the other side, and entering at time x+1, would have you exiting at y+10. In that case, it's not so much that time is moving faster or slower on one side, rather, it's a function of when a portal leads to, dependent on when you enter. And the portal on the other side could have the inverse. I mean, I suppose it doesn't have to have the inverse, but if it didn't, then you'd end up with the problem that moving through the portal one way, and immediately going back through the other way, could have you end up some time forward, or backward, of when you first entered.
JoeZ wrote:Time dilation doesn't really work, anyway, because they are returned to child form while retaining memories. Impossible to explain without invoking the supernatural, unless you assume some absurd thing, like that the wardrobe can suspend their brains, relaunch their consciousness in separate duplicate bodies in Narnia, and then, back on Earth, release them from suspension shortly later while reprogramming their brains to include all the new memories at an impossible rate. That's practically supernatural, anyway.
Well, anti-aging and repair mechanisms are useful to have around, although the anti-aging section may be set a little over-zealously here, although I suppose it could just be set to identify you and revert you back to the age or physical state that you entered with from that side, or such. And who knows how invasive an inter-dimensional portal actually is? I mean, if this is something that can move objects between different timelines, then using a workspace timeline, it could literally have all the time in the world to disassemble, reassemble, repair, record, etc., whatever it sends through, and make it appear seamless. And no matter how long or short such a thing would take, whatever is passing through could end up at the same time on the other side, and in the same state.
JoeZ wrote:Also, as long as we're overanalyzing fantasy fiction, assuming that the surface gravity on Narnia is the same as that of Earth (Which it appears to be, at least judging from the movies), wouldn't it take work to push the water from low potential energy at the bottom of the ocean to the higher potential energy at the level of the lamppost? That would also slow down the flow of water.
Depends on how it works, it would definitely have to get the energy from somewhere. If that had to come entirely from the kinetic energy of what's entering, then it would be really hard to get most objects through. The two sides would have to be at practically equal elevation. I mean, if the gravity is the same, and if there's even 10m difference in elevation, an object would have to be moving through it at at least the same speed as it would take to launch something 10m skyward here on Earth. If that's the case, then no water at all would flow through if the opening on the other side was above sea level(assuming gravity is the same, and sea level in the same, and the radius of the other planet is the same, etc.). It would also mean that could could effectively disable the connection, or make it rather deadly, by moving one end up a couple stories in a building, or any other change in elevation, or from minor differences in local gravity.
On the other hand, if it's drawing power from some other source that shouldn't be a problem, and if you have a device that can connect universes, you have a lot of power options available to you, like setting up a connection to the inside of a star.
Hmm.. I wonder if you could double the flow rate by removing the back of the wardrobe. Or is that a required component?