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Faster than light-speed 
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Faster than light-speed


damn, I've now got to change my sig ...

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Mon Sep 26, 2011 4:47 am
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MrStevenRogers wrote:
Quote:
Faster than light-speed


damn, I've now got to change my sig ...

What about:

Quote:
Nothing travels faster than the speed of light, except neutrinos with bad news ...

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Mon Sep 26, 2011 7:01 am
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adidan wrote:
MrStevenRogers wrote:
Quote:
Faster than light-speed


damn, I've now got to change my sig ...

What about:

Quote:
Nothing travels faster than the speed of light, except neutrinos with bad news ...


:) ...

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Mon Sep 26, 2011 7:31 am
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koli wrote:
The bartender says: "We don't allow faster than light particles in here".
A neutrino walks into a bar.
:lol:

Shared that one at work.

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Mon Sep 26, 2011 12:04 pm
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MrStevenRogers wrote:
What about:
Quote:
Nothing travels faster than the speed of light, except neutrinos with bad news ...

or
Quote:
Nothing travels faster than the speed of light, except neutrinos who disagree with Einstein ...

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Mon Sep 26, 2011 9:55 pm
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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


Wed Oct 19, 2011 10:05 pm
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jonbwfc wrote:
how it might be wrong

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.

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Wed Oct 19, 2011 10:52 pm
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thank god for that. no need for a sig change ...

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Thu Oct 20, 2011 3:40 am
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That documentary was awesome.

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Thu Oct 20, 2011 6:22 am
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l3v1ck wrote:
That documentary was awesome.

That documentary, me and the iplayer have a date.

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Thu Oct 20, 2011 7:19 am
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JJW009 wrote:
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.

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


Thu Oct 20, 2011 10:33 am
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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.

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Thu Oct 20, 2011 11:59 am
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The bartender says: "We don't allow faster than light particles in here".
A neutrino walks into a bar.


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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Thu Oct 20, 2011 8:04 pm
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Spreadie wrote:
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The bartender says: "We don't allow faster than light particles in here".
A neutrino walks into a bar.


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.


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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paulzolo wrote:
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.

...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'. ;)

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Fri Oct 21, 2011 9:28 am
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