Re: Tracking
- From: "Logan Kearsley" <chronosurfer@xxxxxxxxx>
- Date: 28 Apr 2006 14:29:17 -0700
Mark L. Fergerson wrote:
Logan Kearsley wrote:
"Mark L. Fergerson" <mfergerson1@xxxxxxx> wrote in message
news:hCT3g.157354$Oe2.37677@xxxxxxxxxxxxx
MajorOz wrote:
The bad guy is chasing the good guy. The GG jumps to warp speed and
disappearss. The BG says to his near by tekke: "track them using the
_________ trail that they are leaving."
Given the premise of FTL, what possible "trail" could there be?
As has been said, it depends on how the FTL drive works.
Hrm. Would Alcubierre-type g-warps radiate the gravitational
equivalent of Cerenkov radiation? Of course I'm assuming there is such
an equivalent, taking Lense-Thirring to be the nub of a gravitational
analog of magnetism a la Forward's "protational" field. If so, the
c-equivalent would be called "GravitoProtational radiation" instead of
the current "gravitational radiation", and the Cerenkov-analogous
FTL/STL trace would reasonably be supposable to have somebody's name
tacked on; I'm tempted to claim it as "Fergerson Radiation" except
somebody else has prolly already thought of it...
I don't think so. Cerenkov radiation emitted by charged particles in a
medium depends on the relative speed of the particles wrt the medium.
Well, I'm positing (OK, handwaving) a gravitational analog to
Cerenkov, hence "charge" must analogize to "mass".
You
can't determine a speed relative to space without instituting some sort of
preferred frame,
I keep seeing claims that Alcubierre doesn't violate either of the
Relativities (isn't unphysical). That seems to imply that there actually
_is_ a preferred frame, where all luxons (including gravitons, the
quanta of the GraviProtational field) live.
It doesn't (violate relativity or imply a preferred frame). An
Alcubierre bubble essentially moves the space around your ship, taking
the ship along with it. There's no rule about how fast space can move,
just about how fast stuff can move through space, and the ship never
actually does move through space, so the bubble can have FTL speeds, no
preferred frame required.
so the next obvious thing to do is just to emit radiation
in the frame of the particle, but in that case the emitted radiation must be
FTL as well, or else it ends up with imaginary wavelength due to Doppler
shift.
I don't follow. Any form of Cerenkov must travel at c, otherwise we
couldn't see it. This means that c is the "default" velocity of luxons,
when they aren't traveling in some medium other than the New Improved
Aether.
You've got it backward. C is the default velocity of luxons, therefore
Cerenkov radiation must travel at c, since it's just regular old light
which happens to have been produced by a certain process and so has a
special name. A gravitational analogue of Cerenkov radiation may or may
not be composed of any kind of luxon, and would probably involve exotic
methods of detection. What it is composed of would of course effect its
behavior.
But who knows? Maybe imaginary wavelength actually does have some physical
interpretation.
Ooh. In this case, imaginary deBroglie wavelength? Naively the
"length" would rotate into the "time" axis, so Near By Tekke would have
to call out the wavelength in seconds. To maintain consistency (never
mind physicality) I suppose one would have to redact the derivation of
deBroglie wavelength altogether dimensional analysis-wise, taking into
account some coherent way of expressing the FTL momentum of an
Alcubierre-driven ship.
-l.
.
- References:
- Tracking
- From: MajorOz
- Re: Tracking
- From: Mark L. Fergerson
- Re: Tracking
- From: Logan Kearsley
- Re: Tracking
- From: Mark L. Fergerson
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