I was pontificating today on warp (or any non-hyper dimensional FTL) as depicted in fiction. I think it's been touched on in dialog in shows, but not so much in the special effects. It's basically this:
Say you're a light hour away from a ship (we'll call it The Example that has been sitting in Earth orbit. From Earth, it warps over to you (probably arriving in a couple seconds).
The obsever (we're assuming he has some long range equipment) would be able to see the ship in Earth's orbit, and then, suddenly, directly in front of him.
That's not the weird part, though. The weird part is that (for the next hour), you would see a blurred overlapping image of the ship that just arrived extending ALL the way back to Earth, with the line slowly reducing in length BACKWARDS until it vanished at the ship's starting point and everything went back to normal.
Of course, that's assuming that the light from the ship behaved normally as the ship traveled at warp. If the light was ALSO in the warp bubble and traveled with the ship, then everything might appear completely normal. (Except that you would still see the ship happily orbiting Earth for the next hour, because that was an hour ago, and it hadn't left yet.)
I've run into some debates online regarding this, and a few people who also misunderstand the term "relativity of simultaneity." Simply put, THAT term refers to the fact that two objects traveling at different speeds experience time at different speeds. (That is, the faster you go, the less time you experience. Which has been proven, actually!) But the people
I've debated believe that each traveler's subjective time is objectively REAL time, which makes the math (and logic) go insane. If we simply instead assume that there is a "base" time (ie, the speed that time goes when an object is motionless) and adjust all other subjective factors based on that? Everything works out just fine. And that last part is what
makes real-life FTL without time travel theoretically (if not yet practically) possible.
Comments from the tagboard:
02/01/21 11:50 AM
: The other thing is distance. Even at 1 light-hour away, the image of the ship will be smaller because of the way our eyes work. They can only pull in light from a certain angle and the smaller the amount of light there is the less noticeable it is. If we're talking ship's sensors, then in theory it's possible to record it all but one might see
anything from a pin-prick sized light source to a small moon sized light source, if they're lucky! :D I think there's some raytracing programs that can accurately model such things!
02/01/21 11:46 AM
: The whole 'light traveling' thing is a bit confusing, isn't it? My observation of your fictional scenario would be that, unless you know exactly what you're looking for, and know where to look, you might miss the light show! A lot of astronomical light shows only get recorded because someone was there to record them in the first place!