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[TR] US gov boffins achieve speeds FASTER THAN LIGHT - Page 5

post #41 of 101
wow i bet a lot of people here are geeky boffin then lol
post #42 of 101
These scientists are not that smart. They stole technology from UFO/Alien.
    
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post #43 of 101
Wouldn't a similar analogy be saying a car that averages 70mph in a race actually averages slightly over 70mph if you measure the time it finishes from when the front of the car passes the line instead of the middle or the back of the car?
post #44 of 101
Did they make sure this time all the wires are connected ? wink.gif

I'll remain skeptical in this regard overall. As far as sending information faster than light goes - paper takes a lot more than reality. For example you can make two laser beams intersect in a way that the intersection point moves faster than light, however, these sensationalist claims usually overlook the fact that the laser beams themselves still travel at the speed of light, for example.
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post #45 of 101
Yes! The Vulcans shall notice and make 1st contact with Earth thumb.gif
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post #46 of 101
Quote:
Originally Posted by Paradigm84 View Post

Wouldn't a similar analogy be saying a car that averages 70mph in a race actually averages slightly over 70mph if you measure the time it finishes from when the front of the car passes the line instead of the middle or the back of the car?

That's pretty much it. Since light is a particle you would normally measure the proper time it takes to get from point a to point b, but its looks like in this case they're measuring the group velocity of the waveform (sorry, I said phase velocity before which was incorrect). Group velocity can be made negative and even made to exceed the speed of light, however the actual velocity of the photon still remains less than the speed of light.
post #47 of 101
Quote:
Originally Posted by Sourtop View Post

That's pretty much it. Since light is a particle you would normally measure the proper time it takes to get from point a to point b, but its looks like in this case they're measuring the group velocity of the waveform (sorry, I said phase velocity before which was incorrect). Group velocity can be made negative and even made to exceed the speed of light, however the actual velocity of the photon still remains less than the speed of light.

Is it really that simple? Surely then it wouldn't really be news, it would just be them saying "if I measure the time taken for this thing to travel this far a different way I can make it seem like I've broken Physics", I think I'm oversimplifying it, Physics isn't my strong point. biggrin.gif
Quote:
Originally Posted by drbaltazar View Post

wow i bet a lot of people here are geeky boffin then lol

It's a computer hardware forum, what do you think. tongue.gif

Also I resent the use of the word 'boffin' it feels mildly derogatory. biggrin.gif
post #48 of 101
Quote:
Originally Posted by DuckieHo View Post

That was neutrinos reaching a sensor earlier than expected. I think it was refuted or at least heavily contested still.
This is reforming a wave to "nudge" the peak/trough to arrive a tiny bit earlier.

They found that the issue lay within the equipment they were using to measure the speed of the neutrinos.

http://news.sciencemag.org/scienceinsider/2012/02/breaking-news-error-undoes-faster.html
http://www.bbc.co.uk/news/science-environment-17560379
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post #49 of 101
Quote:
Originally Posted by Paradigm84 View Post

Is it really that simple? Surely then it wouldn't really be news, it would just be them saying "if I measure the time taken for this thing to travel this far a different way I can make it seem like I've broken Physics", I think I'm oversimplifying it, Physics isn't my strong point. biggrin.gif

You just hit the nail on the head. From a few quick google searches the people who did this experiment are not even specialists in the area of relativity or quantum field theories. They were experimentalists who do work in optics and it was one guy and what seems like a few of his students. I don't mean to be blunt, but certainly wouldn't trust a plumber to rewire my house (not to say that a plumber couldn't also be an expert electrician biggrin.gif).

One thing people seem to fail to realize is that a PhD in physics (for example) doesn't mean you're an expert in all areas of physics. Someone who does work in gravity and related areas of theoretical physics requires a completely different skill set than someone who does work in condensed matter, optics, nanotechnology, etc. For one thing, advanced areas of theoretical physics require a huge amount of mathematics which the majority of physicists lack or think have no application to physics. When I was doing my undergrad the physics department was almost entirely experimentalists who wanted nothing to do with theoretical physics and even looked down on it as a waste of time.
post #50 of 101
^I agree, a someone with a PhD is only really truly versed in what they did their dissertation on.

personally I'm studying Maths, so I can just forget about reality and learn about stupidly esoteric stuff. biggrin.gif
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