It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Originally posted by whatukno
Once again let me explain relativity to everyone that doesn't believe in FTL.
It's all about observational data. A person moving at the speed of light will see a slower moving object as frozen in time because they will receive the same light waves. To their perspective the slower moving object will have ceased to move because they see only the light moving as fast as they are.
Nothing in relativity states that we cannot go faster than the speed of light.
when you move away from an object at the speed of light you would perceive the object as stationary because you would be moving at the rate the reflected light from the object is moving.
The structure of this mode can indeed bring new information on the nature of the gas in this regime. The monopole oscillation shows a "entering wave" phenomenon, as shown below. This figure was obtained for W/2p=67 Hz, by taking one picture evry millisecond during the monopole oscillation.
When the condensate is stirred at a frequency larger than the critical frequency 0.7 wperp, we observe the nucleation of several vortices. When many vortices are present, they form a triangular lattice. This type of lattice is well known for type II supraconductors placed in a magnetic field, and it is called an Abrikosov lattice. The pictures below show lattices with up to 14 vortices. Using much bigger condensates, the MIT and Boulder groups have recently observed lattices with more than 100 vortices.
In June 1995 our research group at the Joint Institute for Laboratory Astrophysics (now called JILA) in Boulder, Colo., succeeded in creating a minuscule but marvellous droplet. By cooling 2,000 rubidium atoms to a temperature less than 100 billionths of a degree above absolute zero (100 billionths of a degree kelvin), we caused the atoms to lose for a full 10 seconds their individual identities and behave as though they were a single "superatom." The atoms' physical properties, such as their motions, became identical to one another.This Bose-Einstein condensate (BEC), the first observed in a gas, can be thought of as the matter counterpart of the laser-except that in the condensate it is atoms, rather than photons, that dance in perfect unison.
Our short-lived, gelid sample was the experimental realisation of a theoretical construct that has intrigued scientists ever since it was predicted some 73 years ago by the work of physicists Albert Einstein and Satyendra Nath Bose. At ordinary temperatures, the atoms of a gas are scattered throughout the container holding them. Some have high energies (high speeds); others have low ones. Expanding on Bose's work, Einstein showed that if a sample of atoms were cooled sufficiently, a large fraction of them would settle into the single lowest possible energy state in the container. In mathematical terms, their individual wave equations-which describe such physical characteristics of an atom as its position and velocity-would in effect merge, and each atom would become indistinguishable from any other.
Originally posted by daniel_g
Originally posted by whatukno
Once again let me explain relativity to everyone that doesn't believe in FTL.
It's all about observational data. A person moving at the speed of light will see a slower moving object as frozen in time because they will receive the same light waves. To their perspective the slower moving object will have ceased to move because they see only the light moving as fast as they are.
Nothing in relativity states that we cannot go faster than the speed of light.
when you move away from an object at the speed of light you would perceive the object as stationary because you would be moving at the rate the reflected light from the object is moving.
wrong, wrong, and wrong.
Please let me refer you to the second law of relativity. It states that the speed of light, in vacuum, is the same for all observers regardless of their relative motion.
This means that if you were flying away from an object at (or near) the speed of light, you would not see if stationary. Light would still travel at c in your frame!
Now I don't know if I'm the only one that facepalmed after reading the thread's title. Radio waves are electromagnetic radiation. Light is electromagnetic radiation.
Stating that radio waves move faster that the speed light would be equivalent to saying H2O evaporates faster than water. So lets rephrase the title: "Scientists Make Light Travel Faster than Light"
Originally posted by BlasteR
reply to post by rogerstigers
Good post. But I thought faster than light travel has already been proven in a laboratory in the form of Quantum Entanglement
Originally posted by Kaytagg
So, anyone debunk this yet?
Singleton has created a gadget that abuses radio waves so severely that they finally give in and travel faster than light.
Nothing is moving faster than light, he is only firing the radio pulses very fast through an array of antenna, so that all pulses seem to arrive at once at the receiver. It does produce some nice effects but its not FTL.
Originally posted by warrenb
Your link clearly even states that it is FASTER THAN LIGHT
John Singleton of Los Alamos and his collaborators have built a radio transmitter that incorporates a radio wave source that moves superluminally (faster than light)...
* * *
If a radio wave can be accelerated, maybe light in wave form can be accelerated as well.
Clearly Einstein's work advanced human knowledge only a step or two beyond where Newton left us on a ladder which rises much higher than any of us can imagine.
[The] conclusion that neither energy nor information travels faster than c remains valid, [though] group velocity is not entirely meaningless. The smooth Gaussian waveform is reshaped by the absorber, leading to a peak at precisely the time predicted by the [superluminal] group velocity. As for the energy, most of it is absorbed by the medium, and the sensible conclusion is that the transmitted energy comes from the leading edge of the incident pulse, which never travels faster than the speed of light. [Text in square brackets added by Astyanax.]
Since the 1980s, various experiments have verified that it is possible for the group velocity of laser light pulses sent through specially prepared materials to significantly exceed the speed of light in vacuum. However, superluminal communication is not possible in this case, since 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 appear to propagate backwards. However, in all these cases, photons continue to propagate at the expected speed of light in the medium.
* * *
Originally posted by Kaytagg
Sad thing is, most of the ATS users who read this article are now going to be spewing this as "common knowledge" every chance they get...
As one or two smart folk suggested earlier, the solution of this non-paradox lies in the concept of group velocity, that is the velocity of a waveform as opposed to a wave. Even for light waves, group velocity can exceed wave velocity without anything having to move faster than light. But anyone who thinks this makes superluminal communication possible is in for a disappointment.
Originally posted by Astyanax
This Nonsense Has Gone on Long Enough
Yes, pathetic, isn't it? Nine pages of codswallop and a bunch of pseudoscientists jumping up and down in their undershorts going 'Einstein's rubbish has been disproved' and not understanding a word of what's going on. Very sad indeed.
1) Be polite: Above all, we take pride in the fact that AboveTopSecret.com is renowned as a destination for civil and polite discussion of nearly anything. Treat your fellow ATS members with respect, and your time here will be rewarding.
Photon is an invention for the existence of Einstein's science.
"but it is certainly the case that I was edited in such a way as to completely suppress my actual views about the matters the movie discusses. I am, indeed, profoundly unsympathetic to attempts at linking quantum mechanics with consciousness. Moreover, I explained all that, at great length, on camera, to the producers of the film ... Had I known that I would have been so radically misrepresented in the movie, I would certainly not have agreed to be filmed."
More than a dozen scientists, theologians and mystics appear. However, the product placement reveals that among the physicists, neurologists and academics who expound the film's thesis is "new age" icon J.Z. Knight, who claims to be channeling a 35,000-year-old god/warrior from Atlantis named Ramtha. The films' producers, writers, directors, and some of the stars are members of the Ramtha School of Enlightenment in Washington State. Several of the scientists are affiliated with Knight's school, and the film was largely financed by one of Knight's students. It's a blatant effort by religious, mystical, and New Age gurus such as Deepak Chopra to disguise their views as real science
Originally posted by Gorman91
reply to post by littlebunny
I am interested in your experiment, but not sure how it works, could you explain?
Originally posted by BlasteR
reply to post by rogerstigers
Good post. But I thought faster than light travel has already been proven in a laboratory in the form of Quantum Entanglement (aka non-locality) basically in the exact same way a radio wave works (Information being sent instantly to another location without the two ever being in contact).
Scientists who have reviewed What the Bleep Do We Know!? have described distinct assertions made in the film as pseudoscience.
Originally posted by sciencenewby
I am curious to know.... if sound cant travel through a vacuum... and sound is comprised of waves? correct me if im wrong. Then how come we can send radiowaves through a vacuum. and technically a vacuum is void of any matter right? but isnt space filled with light and dust? it may be "emptier" than earth's atmosphere but its not truly empty.
Slightly OT, but there are some theories but nobody really knows what started the big bang. All you can really do is look at observations that everything is moving apart, if you project that backwards, then everything gets closer together the further back you go. Nobody knows what happened in the first fraction of a second, and why.
Originally posted by sciencenewby
the big bang theory doesnt sit well with me because a black hole is so dense that not even light can escape.... its gravity is too intense so nothing can escape except the occasional gamma rays or whatever. So how does all the matter in the universe explode versus make a big black hole?
Originally posted by Astyanax
This Nonsense Has Gone on Long Enough