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MrStevenRogers
Spends far too much time on here
Joined: Fri Apr 24, 2009 9:44 pm
Posts: 4860
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damn, I've now got to change my sig ...
_________________
Hope this helps . . . Steve ...
Nothing known travels faster than light, except bad news ...
HP Pavilion 24" AiO. Ryzen7u. 32GB/1TB M2. Windows 11 Home ...
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| Mon Sep 26, 2011 4:47 am |
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adidan
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 9:43 pm
Posts: 5048
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Fogmeister I ventured into Solitude but didn't really do much.
jonbwfc I was behind her in a queue today - but I wouldn't describe it as 'bushy'.
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| Mon Sep 26, 2011 7:01 am |
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MrStevenRogers
Spends far too much time on here
Joined: Fri Apr 24, 2009 9:44 pm
Posts: 4860
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 ...
_________________
Hope this helps . . . Steve ...
Nothing known travels faster than light, except bad news ...
HP Pavilion 24" AiO. Ryzen7u. 32GB/1TB M2. Windows 11 Home ...
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| Mon Sep 26, 2011 7:31 am |
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Fogmeister
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 7:35 pm
Posts: 6580
Location: Getting there
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:lol: Shared that one at work.
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| Mon Sep 26, 2011 12:04 pm |
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l3v1ck
What's a life?
Joined: Fri Apr 24, 2009 10:21 am
Posts: 12700
Location: The Right Side of the Pennines (metaphorically & geographically)
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| Mon Sep 26, 2011 9:55 pm |
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jonbwfc
What's a life?
Joined: Thu Apr 23, 2009 7:26 pm
Posts: 17040
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BBC Show on this (not quite available as I post this but it should be soon) in case anyone missed it - it's also repeated next Monday. Not a bad show overall. A bit showey on the graphics/camera tricks front but does the explaining job quite well - what the OPERA experiment is all about, how they got the results they did, why it might matter, how it might be wrong, what it means if it turns out to be right. Quite a lot of stuff to cram into an hour so not all of it is covered in great detail but for something aimed at the general public they've done a good job. Basically a better-that-usual episode of 'Horizon' without the label. Jon
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| Wed Oct 19, 2011 10:05 pm |
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JJW009
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 6:58 pm
Posts: 8767
Location: behind the sofa
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I was reading an article on the train today - they figured it out. They were using navigation satellites for timing, but since they're in orbit moving quickly relativistic effects come into play. They hadn't adjusted for these. When they do, the problem goes away. _________________jonbwfc's law: "In any forum thread someone will, no matter what the subject, mention Firefly." When you're feeling too silly for x404, youRwired.net
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| Wed Oct 19, 2011 10:52 pm |
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MrStevenRogers
Spends far too much time on here
Joined: Fri Apr 24, 2009 9:44 pm
Posts: 4860
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thank god for that. no need for a sig change ...
_________________
Hope this helps . . . Steve ...
Nothing known travels faster than light, except bad news ...
HP Pavilion 24" AiO. Ryzen7u. 32GB/1TB M2. Windows 11 Home ...
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| Thu Oct 20, 2011 3:40 am |
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l3v1ck
What's a life?
Joined: Fri Apr 24, 2009 10:21 am
Posts: 12700
Location: The Right Side of the Pennines (metaphorically & geographically)
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That documentary was awesome.
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| Thu Oct 20, 2011 6:22 am |
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adidan
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 9:43 pm
Posts: 5048
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That documentary, me and the iplayer have a date.
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Fogmeister I ventured into Solitude but didn't really do much.
jonbwfc I was behind her in a queue today - but I wouldn't describe it as 'bushy'.
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| Thu Oct 20, 2011 7:19 am |
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jonbwfc
What's a life?
Joined: Thu Apr 23, 2009 7:26 pm
Posts: 17040
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That's interesting, because they discuss the GPS relativistic correction in the show, using it as 'real world' evidence for the validity of relativity. I always assumed the correction was built directly into the satellites rather than something that had to be applied by the receiver. Obviously they did too. Jon
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| Thu Oct 20, 2011 10:33 am |
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JJW009
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 6:58 pm
Posts: 8767
Location: behind the sofa
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The distance measurements were fine, it was the timing signal they were using that was out by about 20nS. It's impossible for the satellite to correct for it, because the variation depends on where the receiver is on the Earth. The satellite just broadcasts one signal.
_________________jonbwfc's law: "In any forum thread someone will, no matter what the subject, mention Firefly." When you're feeling too silly for x404, youRwired.net
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| Thu Oct 20, 2011 11:59 am |
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Spreadie
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 6:06 pm
Posts: 6355
Location: IoW
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I don't get it. Though this is likely because I've missed the point. The theory of time dilation is only possible if lightspeed, not time, is the absolute constant; but if lightspeed is no longer the absolute constant, is time dilation still possible? Someone please explain this in such a way that a dullard like me can understand it.
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Before you judge a man, walk a mile in his shoes; after that, who cares?! He's a mile away and you've got his shoes!
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| Thu Oct 20, 2011 8:04 pm |
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paulzolo
What's a life?
Joined: Thu Apr 23, 2009 6:27 pm
Posts: 12251
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If you have the Star Ship Enterprise and you go around a star fast enough, possibly at warp speed, you’ll go back in time. Most likely to the 1960s and meet a fighter pilot.
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| Fri Oct 21, 2011 9:15 am |
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Spreadie
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 6:06 pm
Posts: 6355
Location: IoW
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...or the 1980s and a Marine Biologist. I got the premise of the joke - I just don't see how it applies, if the speed of light is no longer the 'universal speed limit'. 
_________________
Before you judge a man, walk a mile in his shoes; after that, who cares?! He's a mile away and you've got his shoes!
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| Fri Oct 21, 2011 9:28 am |
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