Radio pulses from pulsar appear to move faster than light

Ive always believed that we are somehow looking upon the universe incorrectly. What we see down here is probably not what actually happens out there. We know the universe is full of laws that alter perceptions so i'm not sure how we can take astronomical information as facts.

But that is true for any distance, so I don't see how you can justify information extracted at astronomical distances as being nonfactual. It seems to me that your logic stretches as far as "I don't understand it, hence it cannot be" which saddens me.

The "laws" of the Universe may not be homogenously applied in all places at all times.

I disagree. If either Laws or Theories, or both, can not be applied to all areas of the universe, that can only mean our reasoning is faulty, not that some areas are exempt.

The "laws" of the Universe may not be homogenously applied in all places at all times.

the pulses from the pulsar traveled through a cloud of neutral hydrogen, which has a resonance of 1420.4 MHz -- the exact center of the bandwidth studied. Passing through the cloud caused anomalous dispersion that resulted in a superluminal group velocity, and pulses with frequencies closest to the resonance frequency arrived earlier than other pulses.

Do you realize the consequences of that is that it would be 100% impossible to prove anything as it regards space and time of an event?

You can't even prove yesterday existed, if this is the case, since it might be some sort of ghost or illusion caused by changes in the laws since the "real" yesterday, in which case, physics is an entirely vain endeavor.

"I hope the cloud is in there, but that dosn't explain why something in the way makes it faster than vacuum."

Sometimes when scientists (and indeed everybody) is confronted with a question they do not understand immediately they will give off a bullshite answer just to get the asker off their case and get some time to think about it.

Actually there is a theoretical way to legally exceed the speed of light in vacuum by emitting a photon in a space where the Casimir effect is noticeable.

I have never ever heard that Einstein's limit for the 'C' was constrained by the condition that 'no information' transfer can exceed that velocity.

Are the authors rewriting Dr. Einstein's postulation?

tkjtkj@gmail.com

At any rate, I wonder what the theory is you're mentioning.

So c should be slightly higher within the cavity since the medium density therein is lower.

If information could propagate faster than light, then that method of signaling (whatever it is) would be superior, represent a more fundamental process, and would/should be used instead. Then Relativity would be relegated exclusively to the electromagnetic domain.

But doesn't atomic teleportation violate that concept? information in such cercumstances is instantaneously transmitted....

ctd.
Whew, done. No more spam from me on this issue =)

@tkjtkj,

Einstein thought the EPR paper showed conclusively that something was very wrong with QM (he ridiculed his own prediction, which he thought was preposterous, as "spooky action at a distance".)

Now, as to what's *really* going on, I personally won't claim to know! Still, I tend to be very suspicious of "teleportation" claims. Really, any instantaneous phenomenon would imply that there is no underlying mechanism (because mechanisms take time to do their thing) -- in other words, teleportation is a rather blatantly magical concept.

An instantaneous phenomenon could have a mechanism that doesn't depend on time. Things are happening instantaneously around us all the time.

An instantaneous phenomenon could have a mechanism that doesn't depend on time.

linked (entangled) entities is not known prior to measurement

if the particles were sent in a known series

Can't you create pairs with known properties without actually measuring them?

Can't you create pairs with known properties without actually measuring them?

Yes - but what would be the point for transmitting information? Upon creation they are in the same place.

he remote site would be measuring each particle it recieves; when the sender at the home site collapsed a particle in the series whose twin was about to reach the remote site, this twin would be seen as an anomaly in the series and thus information. xxxx xxxx xxox xxxx

The effect has been known in laboratory experiments, but these observations were the first in an astrophysical context.

I think everyone is missing this bit in the article.

I think el nose made your point already

so in other words the pulses in the center were not slowed down.. and everything else was. They did not get here faster than light - they just never had to go through a substance that diffracted them and made them go slower

Phase velocity and group velocity exceeding speed of light c in absorptive media is nothing ground breaking

the same effect was disputed before years for jet of M87 galaxy, where it has supposedly the same explanation

..M87 jet superluminosity is an illusion. So elnose is still right..

Simply put we are looking out from earth as our point of reference without understanding the universe completely. We make up stop gap solutions like Dark matter, but these observations may just stem from our incomplete understanding of how galaxies work.

It's quite easy to say, "something is an illusion" and to start with conclusions

Anybody with any illumination on my spintronics comments above and entanglement communicating??

Too expensive or being attempted somewhere as we speak?