On 23 November 2014 at 23:46, Chris Roper <caroper@gmail.com> wrote:
  Russell wrote:


> > The inf
> i
> nity at C is academic as you either tunnel the barrier or forever
> > stay sub-luminal.
>
>
> *luminal* (*uncountable
> <http://en.wiktionary.org/wiki/Appendix:Glossary#uncountable>*)
>
>    1. (medicine <http://en.wiktionary.org/wiki/medicine>) A sedative
>    <http://en.wiktionary.org/wiki/sedative>.
>
>
> So Russell is just trying to keep us all calm again :)
>

1. Definitely that.

and also:

2.  http://en.wikipedia.org/wiki/Faster-than-light

Faster-than-light (also superluminal or FTL) communication
<http://en.wikipedia.org/wiki/Superluminal_communication> and travel
<http://en.wikipedia.org/wiki/Interstellar_travel> refer to the propagation
of information <http://en.wikipedia.org/wiki/Information> or matter
<http://en.wikipedia.org/wiki/Matter> faster than the speed of light
<http://en.wikipedia.org/wiki/Speed_of_light>. Under the special theory of
relativity <http://en.wikipedia.org/wiki/Special_theory_of_relativity>, a
particle (that has rest mass
<http://en.wikipedia.org/wiki/Mass_in_special_relativity>) with *subluminal=
*
<http://en.wiktionary.org/wiki/subluminal>* velocity* needs infinite energy
to accelerate to the speed of light, although special relativity does not
forbid the existence of particles that travel faster than light at all
times (tachyons <http://en.wikipedia.org/wiki/Tachyon>).


3. http://en.wiktionary.org/wiki/subluminal

*subluminal* (*comparative
<http://en.wiktionary.org/wiki/Appendix:Glossary#comparable>* *more
<http://en.wiktionary.org/wiki/more#English> subluminal*, *superlative
<http://en.wiktionary.org/wiki/Appendix:Glossary#comparable>* *most
<http://en.wiktionary.org/wiki/most#English> subluminal*)

   1. slower-than-light
   <http://en.wiktionary.org/w/index.php?title=3Dslower-than-light&action=
=3Dedit&redlink=3D1>;
   having a speed <http://en.wiktionary.org/wiki/speed> less than light
   <http://en.wiktionary.org/wiki/light>.


4.  Definitely not to be confused with the Alcubierre drive :-)
This is a genuine "warp drive" (or would be if one was ever able to be
built and built.
Satisfies Einsteins field equations.
     "
The *Alcubierre drive* or *Alcubierre metric* (referring to metric tensor
<http://en.wikipedia.org/wiki/Metric_tensor#Lorentzian_metrics_from_relativ=
ity>)
is a speculative idea based on a solution of Einstein's field equations
<http://en.wikipedia.org/wiki/Einstein_field_equations> in
general relativity <http://en.wikipedia.org/wiki/General_relativity> as
proposed by theoretical physicist Miguel Alcubierre
<http://en.wikipedia.org/wiki/Miguel_Alcubierre>, by which a spacecraft
could achieve faster-than-light
<http://en.wikipedia.org/wiki/Faster-than-light> travel if a configurable
energy-density <http://en.wikipedia.org/wiki/Energy_density> field lower
than that of vacuum (i.e. negative mass
<http://en.wikipedia.org/wiki/Negative_mass>) could be created. Rather than
exceeding the speed of light within its local frame of reference
<http://en.wikipedia.org/wiki/Frame_of_reference>, a spacecraft would
traverse distances by contracting space in front of it and expanding space
behind it, resulting in effective faster-than-light travel."



http://en.wikipedia.org/wiki/Alcubierre_drive




         R
--=20
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