Dirk Van de moortel wrote:
"Pentcho Valev" wrote in message oups.com...
Perhaps there is no statement in science more popular than "According
to Einstein's theory of relativity, nothing can move faster than
light". Accordingly, one would expect the discovery of greater speeds
to become one of the greatest sensations for the last 100 years. Not in
the zombie world:

http://i-newswire.com/pr43033.html
http://www.newscientist.com/article.ns?id=dn2796

The authors, who are experts in telecommunication and obviously have
nothing to do with the theory of relativity, don't wish to offend
relativists and accordingly offer the following short explanations:

"They were also able to create extreme conditions in which the light
signal travelled faster than 300 million meters a second. And even
though this seems to violate all sorts of cherished physical
assumptions, Einstein needn't move over - relativity isn't called
into question, because only a portion of the signal is affected."

"By using the oscilloscope to trace the pulse's strength and speed, the
researchers confirmed they sent the signal's peak tunnelling through
the cable at more than four billion kilometres per hour. "It really is
basement science," Robertson said. The apparatus is so simple that
Robertson once assembled the setup from scratch in 40 minutes. While
the peak moves faster than light speed, the total energy of the pulse
does not. This means Einstein's relativity is preserved, so do not
expect super-fast starships or time machines anytime soon."

Initiated relativists find the explanations extremely convincing
whereas the rest of the scientific world is taught to obey the
principle of Ignatius of Loyola:

"That we may in all things attain the truth, that we may not err in
anything, we ought ever to hold it a fixed principle, that what I see
white I believe to be black if the Romish Church define it so to be".

Pentcho Valev

For those who don't understand basement science and
need a fancy moving pictu
http://gregegan.customer.netspace.ne...ETS/20/20.html
http://www2.ee.mu.oz.au/staff/summer..._velocity.html
http://webphysics.davidson.edu/Apple...pVelocity.html
http://galileo.phys.virginia.edu/cla...pVelocity.html

Dirk Vdm

Strangely, moving pictures are no longer moving. This may have
something to do with my computer but if that is not the case, what is
going on in the relativity cult? Who is going to explain? Roberts?
Zombies?

Pentcho Valev

They work fine on mine, and they illustrate an effect that you could
easily get excited over for without realizing what it is.
Some of this holds interesting possibilities, though. They haven't
figured out a way to send the whole wave packet past c, but maybe they
could. I wonder what the nature of the lightspeed barrier really is.
It's there, other experiments have shown it, but why it's there, who
can say?

In sci.physics, Pentcho Valev

wrote
on 8 Nov 2005 01:08:59 -0800
.com:
Dirk Van de moortel wrote:
"Pentcho Valev" wrote in message oups.com...
Perhaps there is no statement in science more popular than "According
to Einstein's theory of relativity, nothing can move faster than
light". Accordingly, one would expect the discovery of greater speeds
to become one of the greatest sensations for the last 100 years. Not in
the zombie world:

http://i-newswire.com/pr43033.html
http://www.newscientist.com/article.ns?id=dn2796

The authors, who are experts in telecommunication and obviously have
nothing to do with the theory of relativity, don't wish to offend
relativists and accordingly offer the following short explanations:

"They were also able to create extreme conditions in which the light
signal travelled faster than 300 million meters a second. And even
though this seems to violate all sorts of cherished physical
assumptions, Einstein needn't move over - relativity isn't called
into question, because only a portion of the signal is affected."

"By using the oscilloscope to trace the pulse's strength and speed, the
researchers confirmed they sent the signal's peak tunnelling through
the cable at more than four billion kilometres per hour. "It really is
basement science," Robertson said. The apparatus is so simple that
Robertson once assembled the setup from scratch in 40 minutes. While
the peak moves faster than light speed, the total energy of the pulse
does not. This means Einstein's relativity is preserved, so do not
expect super-fast starships or time machines anytime soon."

Initiated relativists find the explanations extremely convincing
whereas the rest of the scientific world is taught to obey the
principle of Ignatius of Loyola:

"That we may in all things attain the truth, that we may not err in
anything, we ought ever to hold it a fixed principle, that what I see
white I believe to be black if the Romish Church define it so to be".

Pentcho Valev

For those who don't understand basement science and
need a fancy moving pictu
http://gregegan.customer.netspace.ne...ETS/20/20.html

Java Applet.

http://www2.ee.mu.oz.au/staff/summer..._velocity.html

Another applet; this one's adjustable.

http://webphysics.davidson.edu/Apple...pVelocity.html

Another applet. There are some problems with this applet; the reset
does not work and it's not clear how to properly demonstrate the
effect.

http://galileo.phys.virginia.edu/cla...pVelocity.html

Surprise -- another applet. This one may work better if the frequency
is set to its maximum value, making the "group" more obvious.


Dirk Vdm

Strangely, moving pictures are no longer moving. This may have
something to do with my computer but if that is not the case, what is
going on in the relativity cult? Who is going to explain? Roberts?
Zombies?

It's your 'puter; Java and Windows don't get along all that well. :-)


Pentcho Valev


--
#191,
It's still legal to go .sigless.

For those who don't understand basement science and
need a fancy moving pictu
http://gregegan.customer.netspace.ne...ETS/20/20.html
http://www2.ee.mu.oz.au/staff/summer..._velocity.html
http://webphysics.davidson.edu/Apple...pVelocity.html
http://galileo.phys.virginia.edu/cla...pVelocity.html

Dirk Vdm


Gosh, those are fun! I could play with them for hours.

"Tice with a J" wrote in message
ups.com...
They work fine on mine, and they illustrate an effect that you could
easily get excited over for without realizing what it is.
Some of this holds interesting possibilities, though. They haven't
figured out a way to send the whole wave packet past c, but maybe they
could. I wonder what the nature of the lightspeed barrier really is.

Violation would lead to problems with casualty.

It's there, other experiments have shown it, but why it's there, who
can say?


Rest assured if anyone was able to actually signal faster than c it would be
big news and you will hear about it without having to look for it. All they
have been able to do so far, in experiments like the Nimitz experiment, is
send very noisy signals using tunneling effects. It is hardly surprising
that it is noisy because in tunneling particles are only partly tunnel
through a barrier.

Thanks
Bill

Tice with a J wrote:
They work fine on mine,

And for me.


and they illustrate an effect that you could
easily get excited over for without realizing what it is.

Yes. In a region of anomalous dispersion, group velocity c. But still,
as the applet shows, no information travels from source to detector with
speed c.


Some of this holds interesting possibilities, though. They haven't
figured out a way to send the whole wave packet past c, but maybe they
could.

Nope. That's not possible. For the group velocity to travel c the
component waves must ALREADY be present. Then the group carries no
additional information.



Tom Roberts

Bill Hobba wrote:
Rest assured if anyone was able to actually signal faster than c it would be
big news and you will hear about it without having to look for it.

Yes, for sure.


All they
have been able to do so far, in experiments like the Nimitz experiment, is
send very noisy signals using tunneling effects.

And the front speed of those noisy signals travels c. Information
travels with the front speed.


Tom Roberts

Mahmoud In My Dinner Jacket wrote:
For those who don't understand basement science and
need a fancy moving pictu
http://gregegan.customer.netspace.ne...ETS/20/20.html
http://www2.ee.mu.oz.au/staff/summer..._velocity.html
http://webphysics.davidson.edu/Apple...pVelocity.html
http://galileo.phys.virginia.edu/cla...pVelocity.html

Dirk Vdm


Gosh, those are fun! I could play with them for hours.

I'm still playing with them.

WHEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!!!

I'm still playing with IT.

WHEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!!

wrote:
I'm still playing with IT.

WHEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!!

You dropped the first "T". :-D