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'[OT]: Faster than the speed of light...'
2007\03\14@194051 by

"Cerenkov Radiation comes from particles traveling at a speed greater than the speed of light in the medium in which they are moving."

http://smthop.com/articles1details.asp?NewsNum=805

There are other instances that I have run across that do not accept the speed of light as a limit.

I doubt I will ever grasp the essence of such things.

John Ferrell    W8CCW
"Life is easier if you learn to plow
around the stumps"
http://DixieNC.US
John Ferrell wrote:
> "Cerenkov Radiation comes from particles traveling at a speed greater than the speed of light in the medium in which they are moving."
>
> smthop.com/articles1details.asp?NewsNum=805
>
> There are other instances that I have run across that do not accept the speed of light as a limit.
The limit is the speed of light in a vacuum, which is a constant, c. The
speed of light in any other medium can be exceeded (as it is variable),
it is the speed of light in a vacuum that can't. Exceeding the speed of
light in a medium will cause nifty effects like Cerenkov Radiation, but
it's certainly possible and commonplace around certain radioactive
materials.

Also, moving faster than the speed of light in a vacuum is supposedly
possible (the mathematics allow for it), it's just crossing the boundary
of the speed of light (both ways) that isn't.

--
Hector Martin (hectormarcansoft.com)
Public Key: http://www.marcansoft.com/marcan.asc

yeah .....as far as i know....... einteins original statement which is
usually cut short..... was ..."nothing can travel faster than
light".........."...unless it is part of the unified field" ..... and in
1987 ....neutrinos were verified arriving to earth 3 seconds before visible
light from supernova1987 explosion
Hector has it right. Also, it is interesting to note that a phase
velocity of an EM wave in a waveguide can be faster than c (much
faster, in fact). However, the group velocity cannot be. Phase
velocity is the velocity you get from picking a phase point on a
sinusoid and following it through space. Group velocity is the
velocity of a wave packet or modulated waveform through space (so
information would move at the group velocity).

Sean

On 3/14/07, Hector Martin <hectormarcansoft.com> wrote:
{Quote hidden}

> -
> There are other instances that I have run across that do not accept
the speed of light as a limit.

In the isntances that I have seen there is a *phenomenon* that travels
faster than light. Not a particicle, not a wave, not information.

> I doubt I will ever grasp the essence of such things.

The essence is creative use of words. Some things can indeed travel
faster than light, but only for very creative use of the word "thing".

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: http://www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: http://www.voti.nl/hvu

On 3/15/07, wouter van ooijen <woutervoti.nl> wrote:
> > There are other instances that I have run across that do not accept
> the speed of light as a limit.
>
> In the isntances that I have seen there is a *phenomenon* that travels
> faster than light. Not a particicle, not a wave, not information.
>
> > I doubt I will ever grasp the essence of such things.
>
> The essence is creative use of words. Some things can indeed travel
> faster than light, but only for very creative use of the word "thing".

Think, not thing.  How do you want to travel: like the blowing wind or
like an intense  think ?
:)
Vasile
On 3/14/07, Hector Martin <hectormarcansoft.com> wrote:
> John Ferrell wrote:
> > The following link addresses an instance of radiation traveling faster than the speed of light.
> > "Cerenkov Radiation comes from particles traveling at a speed greater than the speed of light in the medium in which they are moving."
> >
> > smthop.com/articles1details.asp?NewsNum=805
> >
> > There are other instances that I have run across that do not accept the speed of light as a limit.
> The limit is the speed of light in a vacuum, which is a constant, c. The
> speed of light in any other medium can be exceeded (as it is variable),
> it is the speed of light in a vacuum that can't. Exceeding the speed of
> light in a medium will cause nifty effects like Cerenkov Radiation, but
> it's certainly possible and commonplace around certain radioactive
> materials.

Yes, it is.  That's what causes the lovely blue glow around a nuclear
reactor sitting in it's water bath.  The particle radiation is exceeding the
speed of light in the local medium (water), though not the speed of
light in a vacuum.

Bill

--
Psst...  Hey, you... Buddy...  Want a kitten?  straycatblues.petfinder.org
On 3/14/07, George OConner <george.oconnergmail.com> wrote:

> yeah .....as far as i know....... einteins original statement which is
> usually cut short..... was ..."nothing can travel faster than
> light".........."...unless it is part of the unified field" ..... and in
> 1987 ....neutrinos were verified arriving to earth 3 seconds before visible
> light from supernova1987 explosion

Actually, the neutrino pulse arrived 3 hours before the visible light
from the supernova, which was consistant with theoretical predictions.
This does not mean that the neutrinos were traveling faster than
light, just that they started first.

http://www.physicscentral.com/action/2001/neutrino.html

Bill

--
Psst...  Hey, you... Buddy...  Want a kitten?  straycatblues.petfinder.org
>
>
> Actually, the neutrino pulse arrived 3 hours before the visible light
> from the supernova, which was consistant with theoretical predictions.
> This does not mean that the neutrinos were traveling faster than
> light, just that they started first.

Hmm.. If you could make the detector small enough, then you could sell a
\$49.95 shirt pocket detector that would give you three hours warning if the
sun was going to go nova!

:)
>Hmm.. If you could make the detector small enough, then you could
>sell a \$49.95 shirt pocket detector that would give you three hours
>warning if the sun was going to go nova!

Lets see - a small SMD blue led, a 10F200 to PWM fade it off and on, a coin
cell, and a container of "extra pure distilled water" for the LED to shine
into ... I think that cuts a fair BOM for a \$49.95 product ...

Oh goodee, there really is a market for my invention ...

Actually, given that the chances of the sun going nova during our
frame of existence are essentially nil, and there's no possiblity of
someone demanding a refund if their detector failed to provide the
advertised three hour warning of an impending solar nova, why
not just sell an empty box?

Mike H.

> Lets see - a small SMD blue led, a 10F200 to PWM fade it off and on, a coin
> cell, and a container of "extra pure distilled water" for the LED to shine
> into ... I think that cuts a fair BOM for a \$49.95 product ...

>-----Original Message-----
>From: piclist-bouncesmit.edu [piclist-bouncesmit.edu]
>On Behalf Of Mike Hord
>Sent: 15 March 2007 16:06
>To: Microcontroller discussion list - Public.
>Subject: Re: [OT]: Faster than the speed of light...
>
>
>Actually, given that the chances of the sun going nova during
>our frame of existence are essentially nil, and there's no
>possiblity of someone demanding a refund if their detector
>failed to provide the advertised three hour warning of an
>impending solar nova, why not just sell an empty box?
>

Would you like some copper tubing containing polarised water to go with that? http://www.lessstress.ie/how_spiral_works.htm

Mike

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>
>
> Would you like some copper tubing containing polarised water to go with
> that? http://www.lessstress.ie/how_spiral_works.htm

A HUNDRED AND EIGHTY FIVE POUNDS FOR A PAPERWEIGHT????????

I truly AM in the wrong business..

I note that putting your other crystals in a poly bag will prevent them from
interfering with the paperweight.
But somehow the acrylic resin dosen't bother it.

Hmm..

>-----Original Message-----
>From: piclist-bouncesmit.edu [piclist-bouncesmit.edu]
>On Behalf Of David VanHorn
>Sent: 15 March 2007 16:39
>To: Microcontroller discussion list - Public.
>Subject: Re: [OT]: Faster than the speed of light...
>
>
>>
>>
>> Would you like some copper tubing containing polarised water to go
>> with that? http://www.lessstress.ie/how_spiral_works.htm
>
>
>
>A HUNDRED AND EIGHTY FIVE POUNDS FOR A PAPERWEIGHT????????
>

Hey, creating a unified para and dia-magnetic field that harmonises the elemental forces that have become so disrupted that they now endanger the ecosystem of planet earth and the health of individuals is very tricky!

Q. I purchased this product and since then almost everyone I have shown it to has told me I am an idiot.
A. Clearly you have a very strong negative aura which is affecting other abilities to see you for the person you are.  Don't worry, this can be fixed by purchasing as many copper spirals as possible.

Regards

Mike

=======================================================================
This e-mail is intended for the person it is addressed to only. The
information contained in it may be confidential and/or protected by
law. If you are not the intended recipient of this message, you must
not make any use of this information, or copy or show it to any
received this e-mail, and return the original to us. Any use,
forwarding, printing or copying of this message is strictly prohibited.
No part of this message can be considered a request for goods or
services.
=======================================================================

>
> A HUNDRED AND EIGHTY FIVE POUNDS FOR A PAPERWEIGHT????????

Sounds a little too heavy to be practical.
Most paperweights around here weight just a pound or two.

Lyle

>
>
> Sounds a little too heavy to be practical.
> Most paperweights around here weight just a pound or two.

Just see how many papers get away!

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