Re: 'We have broken speed of light'
- From: Mikal119 <adravirgo@xxxxxxxxx>
- Date: Thu, 16 Aug 2007 17:53:06 -0700
On Aug 16, 5:16 pm, jose <josefsop...@xxxxxxxxx> wrote:
On Aug 16, 3:22 pm, Mikal119 <adravi...@xxxxxxxxx> wrote:
On Aug 16, 4:10 pm, jose <josefsop...@xxxxxxxxx> wrote:
'We have broken speed of light'
By Nic Fleming, Science Correspondent
Last Updated: 12:01am BST 16/08/2007
A pair of German physicists claim to have broken the speed of light -
an achievement that would undermine our entire understanding of space
and time.
According to Einstein's special theory of relativity, it would require
an infinite amount of energy to propel an object at more than 186,000
miles per second.
However, Dr Gunter Nimtz and Dr Alfons Stahlhofen, of the University
of Koblenz, say they may have breached a key tenet of that theory.
advertisement
The pair say they have conducted an experiment in which microwave
photons - energetic packets of light - travelled "instantaneously"
between a pair of prisms that had been moved up to 3ft apart.
Being able to travel faster than the speed of light would lead to a
wide variety of bizarre consequences.
For instance, an astronaut moving faster than it would theoretically
arrive at a destination before leaving.
The scientists were investigating a phenomenon called quantum
tunnelling, which allows sub-atomic particles to break apparently
unbreakable laws.
Dr Nimtz told New Scientist magazine: "For the time being, this is the
only violation of special relativity that I know of."
Subject: c/ng >c
Newsgroups: alt.religion.kibology
View: (This is the only article in this thread) | Original Format
Date: 2000/07/20
<snip>
http://www.neci.nj.nec.com/homepages/lwan/sld001.htm
The link is dead now,and so is this next one, but fortunately I saved
the text..
but it makes me wonder if scientists are actually keeping track of
what is going on in their fields.
"In May this year, Mugnai et al.4 reported superluminal behaviour in
the
propagation of microwaves (centimetre wavelengths) over much longer
distances (tens of centimetres) at a speed 7% faster than c. A report
by
Wang et al.5 ( page 277 of this issue) now demonstrates a very large
superluminal effect for pulses of visible light, in which a pulse
propagates in a specially prepared medium with a negative velocity of
-c/310: that is, not only faster than a pulse travelling in a vacuum,
but so fast that the peak of the pulse exits the medium before it
enters
it!"http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v406/...
HAND- Hide quoted text -
- Show quoted text -
One would think that scientists would publish
their accomplishments in scientific journals
not in the ordinary press thus allowing peer
scrutiny.
The original link had the hard data ..
http://www.neci.nj.nec.com/homepages/lwan/sld001.htm
If you break down "photon" into specific nanometers and send a signal
through a rarified gas you will get strange results, but after closer
examination it turned out to be an artifact and not in actuality
superluminal signaling, but rather a faster black box.There are uses
for communication gear using the principles.
http://en.wikipedia.org/wiki/Group_velocity
Until ca. 1980, the group velocity was often considered to be the
velocity at which energy or information is conveyed by a wave. In most
cases this was accurate, and the group velocity was thought of as the
signal velocity of the waveform. However, with the advance of high-
power, short-pulse laser experiments and fiber-optics laser
experiments after ca. 1980, it was often calculated and verified that
if the wave is traveling through an absorptive medium, this does not
always hold. For example, it is possible to calculate and design
experiments where the group velocity of laser light pulses sent
through specially prepared materials significantly exceeds the speed
of light in vacuum. However, superluminal communication is not
happening -- the signal velocity remains less than the speed of light.
It is also possible to reduce the group velocity to zero, stopping the
pulse, or have negative group velocity, making the pulse actually
propagate backwards. However, in all these cases, photons continue to
propagate at the expected speed of light in the medium. [1] [2] [3]
[4]
This is whats going on on the experiment I posted about.I havent
looked deeply at the other one-yet
.
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