Cefairon#FTL #Multiverse auf dem knapp 10 Jahre alten Zenbook mit Kubuntu installiert. Zack 95% RAM voll. Hätte gerne KDE Plasma auf allen Geräten, aber ich fürchte, da muss ich mir was überlegen.
ARGVMI~1.PIFOverheard a TV show about aliens. Flying saucers, abductions, investigations, that sort of thing.
Somebody on the show claims that aliens have reactionless propulsion that moves the ship by distorting spacetime.
That's the definition of a #warp drive! If #aliens have that tech, a lot of Earthlings (including me) are gonna want to know how it works.
They're also babbling about how the ayys have stabilized element 115 and somehow use it for #FTL. Sounds pretty bogus. It's not exotic matter.
Melllvar
Southwind Niehaus 🔻Spaceship Fuel - Live at RadioSpiral 23 July 2025
> This strange substance is what enables ships going faster than light. #ambient #ftl #music Next Wednesday live at my show El Telescopio on https://radiospira...
Roger Crew✅❌☑🗸❎✖✓✔I of course goofed and left out the explanation of Lorentz Contraction from the obvious place in Part 3 where I should have talked about it.
So I've slotted it in here:
https://wrog.dreamwidth.org/71271.html#hrel3_lorentz
along with a new diagram to make super-clear what's happening.
Or if you want to get the flow/parallelism there's now this link https://wrog.dreamwidth.org/71271.html#hrel3_timedil
to the earlier time dilation discussion (cleaned up a bit), since that's really the same issue but turned on its side 90°.
So maybe the Stargate SG-1 example will be clearer now. or maybe not
(the point of the blue arrows is this is the kind of shit you can do if you have stargates: A Completely Easy Time Machine they'd have built half-way thru season 2)
Part 4:
https://wrog.dreamwidth.org/71432.html
#physics #relativity #ftl #scienceed
On the Storrow Drive Theorem
This is on how, having developed how one does spacetime for a 1-dimensional universe, how you put back the 2nd and 3rd spatial dimensions,
and the key question is what happens when you have college students attempting to measure the height of a bridge using rental trucks,
i.e., what differences are there in how the Moving People see it vs. how the Stationary People see it. Do the Moving People see a different height? Or see the truck slanted weirdly? Curiously, the answer to both of these turns out to be NO.
And we have this fun diagram
Mal wieder #IntotheBreach und #FTL (+Multiverse) installiert. Leider ist letzteres nicht so gut am Steamdeck spielbar, aber beide Spiele sind so gut! 😃 Bin schon auf das nächste Spiel von Subset Game gespannt, das auf dem PC erscheint.
Part 3:
https://wrog.dreamwidth.org/71271.html
…introduce the _Interval_ between two events
= (Δz, spatial separation)² − (Δt, time lapse)²
and show that this number is an **invariant**, i.e., all slower-than-light observers get the same result calculating this in their own coordinates.
Magic diagram (with ALT text!) below proves this for Moving (upwards) vs. Anti-Moving (downwards, same speed) observers (i.e., using that Intermediate POV from before), and go from there.
Interval is either
(*) (proper distance)² > 0 [events are simultaneous for somebody],
(*) −(proper time)² < 0 [events are co-located for somebody], or
(*) zero [light-speed trajectory]
and then we do Twin Paradox and How FTL Violates Causality.
#physics #relativity #ftl #scienceed
I also really like how this diagram came out.
It's another spacetime-with-left-to-right-time grid from the stationary observer POV, showing trajectories of
(*) the stationary observer,
(*) the (velocity v) moving observer, and
(*) all possible in-between trajectories
+
how the two observers measure velocities
+
how the two observers will **not** agree on which trajectory is going v/2
+
how the One True Intermediate Trajectory
(i.e., the one that both see going the same speed) is between the v/2 trajectories **and** seen by both observers as going **faster** than v/2.
...this being the Big Red Flag that velocities don't add the way you'd think.
(also spelled out more fully in Part 2)
