Go Back   Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum > General Science Forums > Physics Forum
Register Search Today's Posts Mark Forums Read

Physics Forum Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


Empirically Confirmed Superluminal Velocities?

Empirically Confirmed Superluminal Velocities? - Physics Forum

Empirically Confirmed Superluminal Velocities? - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-21-2002, 11:59 PM
Paul R. Mays
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?




"holog" <[Only registered users see links. ]> wrote in message
news:98Ykb.31461$[Only registered users see links. ].. .
news:<[Only registered users see links. ]>...

c only applies to matter with relative mass..
No relative mass... No speeding tickets....


Paul R. Mays
----------------------------------------------------------------------------
-
Some where within the Quantum State
[Only registered users see links. ]
[Only registered users see links. ]
[Only registered users see links. ]

"Science is not gadgetry. The desirable adjuncts of modern
living, although in many instances made possible by
science, certainly do not constitute science. Basic scientific
knowledge often (but not always) is a prerequisite to such
developments, but technology primarily deserves the credit
for having the financial courage, the ingenuity, and the
driving energy to see to it that so-called “pure knowledge”
is in fact brought to the practical service of man. And it
should also be recognized that those who have the urge to
apply knowledge usefully have themselves often made
significant contribution to pure knowledge and have even
more often served as a stimulation to the activities of a pure
researcher."
- Warren Weaver
(1894–1978)




Reply With Quote
  #2  
Old 10-19-2003, 03:21 PM
Perfectly Innocent
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?

There are plenty of scientific papers and news reports touting
superluminal velocities and even negative transit times for pulses of
light propagating through atomic caesium vapor.

[Only registered users see links. ]
[Only registered users see links. ]

I wonder if this is all nonsensical hoopla based on the antiquated
wave theory of light or if there is a real, measurable
faster-than-light particle view of quantum mechanical tunneling going
on. If I understand Richard P. Feynman correctly, photons are always
particles; the wave nature of light only reveals itself in terms of
probabilities. All quantum mechanists know the rules of adding
amplitudes but I would like to know if something new about quantum
mechanical tunneling has been revealed. Are individual photons in
these experiments moving at velocities faster than light?

Answer:

The sheer mention of this result together with Einstein's theory of
special relativity and the principle of causality is a scam. Not a
single photon is moving faster than light.

The alleged generation of superluminal velocities without violating
causality is intentionally misleading physicists' hoopla and all the
media hype is pure distortion. The fact that the dramatic 60 ns
advance is only one fiftieth of the width of the pulse is a clear
indication of this.

If you were hoping to conceptualize how Einstein's special theory of
relativity might be false, then don't let these facts disappoint you.
It is possible to modify Einstein's special theory to allow for motion
faster than light.

[Only registered users see links. ]
[Only registered users see links. ]

Is there a real empirically confirmed theory of superluminal
velocities? No, not yet. But there is no evil in being able to
conceptualize such things.

Eugene Shubert
Reply With Quote
  #3  
Old 10-19-2003, 05:12 PM
Sam Wormley
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?

Perfectly Innocent wrote:

And yet Nature's speed limit is not locally violated for mass in
motion, propagation of electromagnetic radiation or communication
of information.
Reply With Quote
  #4  
Old 10-19-2003, 06:34 PM
Dirk Van de moortel
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?


"Perfectly Innocent" <[Only registered users see links. ]> wrote in message news:c45b45b3.0310190721.44eef764@posting.google.c om...

See today's reply on a similar thread in sci.physics:
http://groups.google.com/groups?&threadm=5zjkb.821525$uu5.145166@sccrnsc04

Dirk Vdm


Reply With Quote
  #5  
Old 10-19-2003, 07:06 PM
Mathew Orman
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?


"Dirk Van de moortel" <[Only registered users see links. ]> wrote
in message news:fPAkb.89991$[Only registered users see links. ]...
news:c45b45b3.0310190721.44eef764@posting.google.c om...
http://groups.google.com/groups?&threadm=5zjkb.821525$uu5.145166@sccrnsc04

The Java applet is false
it shows several component waves traveling with different speed,
the top is the slowest and the bottom the fastest.
Also it is irrelevant to the subject of single pulse transient.

Bologna mathematicians are not able to show such applets for the single
gaussian pulse transient!

Mathematical bologna!

Sincerely,

Mathew Orman
[Only registered users see links. ]
[Only registered users see links. ]



Reply With Quote
  #6  
Old 10-19-2003, 07:48 PM
holog
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?



Perfectly Innocent wrote:


Reply With Quote
  #7  
Old 10-19-2003, 07:53 PM
holog
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?



Perfectly Innocent wrote:




Why do people think if you go faster than light you can immediately go
back in time?
i.e. if you could travel at twice the speed of light it would still take
two years to get to alpha centuri, right?


holog


Reply With Quote
  #8  
Old 10-19-2003, 08:41 PM
pstowe{Blues}@ix.netcom.com
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?

On Sun, 19 Oct 2003 15:53:38 -0400, holog <[Only registered users see links. ]> wrote:


Yup...

The problem is definitions of SR as to 'event sequencing'. LRT does
not have this problem since it does NOT have a defined
synchronization process that sets time as a pseudo-distance...

Paul Stowe
Reply With Quote
  #9  
Old 10-20-2003, 10:52 AM
Bilge
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?

Perfectly Innocent:


Neither.


Right.


Yeah. That it doesn't make sense to think of quantum mechanics in the
same way one thinks of classical mechanics.


That doesn't really make much sense quantum mechanically.


Whatever.


Don't read the media hype.


The fact that you're looking at a pulse means you aren't looking
at photons. However, I don't really feel like explaining it in
detail, as I'm sure it won't matter.


The "facts" you've mentioned don't really say much about it
one way or the other.


Sure, if you give light a mass. Then, a photon is just like any other
massive particle.



Reply With Quote
  #10  
Old 10-20-2003, 08:47 PM
Mark Palenik
Guest
 
Posts: n/a
Default Empirically Confirmed Superluminal Velocities?


"Paul Cardinale" <[Only registered users see links. ]> wrote in message
news:64050551.0310201031.4708f224@posting.google.c om...
news:<[Only registered users see links. ]>...

Very true. That would be like denying the existence of space-like
geodesics, which obviously do exist. We just can't have real "things"
moving along them.

SR has no problem with, for example, someone spinning a flashlight around in
the center of a cyllindrical room with a radius of 1 light year at one
revolution per second.


Reply With Quote
Reply

Tags
confirmed , empirically , superluminal , velocities


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
metal optics, superluminal tunneling effects, spin formula in electrodynamics Josef Matz Forum Physik 0 03-31-2005 12:25 AM
metal optics, superluminal tunneling effects, spin formula in electrodynamics Josef Matz Physics Forum 0 03-31-2005 12:02 AM
Überlichtgeschwindigkeiten / superluminal velocities josefmatz Forum Physik 9 10-03-2004 06:06 PM


All times are GMT. The time now is 12:23 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved
Page generated in 0.18782 seconds with 16 queries