Comments for Jim Al-Khalili's Website http://www.jimal-khalili.com The Website of Professor Jim Al-Khalili Mon, 06 Feb 2012 12:58:54 +0000 hourly 1 Comment on Faster than the speed of light? by hw looi http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-2443 hw looi Mon, 06 Feb 2012 12:58:54 +0000 http://www.jimal-khalili.com/?p=1055#comment-2443 Dear Professor Jim Al-Khalifi, If we believe that neutrinos do have a mass from the point of creation of the neutrino to the point of detection, as such they should react to gravity and would form an extremely dense layer of orbiting neutrinos around every black hole because of their immense speed and their superior numbers in this universe. I wonder if anyone has found such a layer of orbiting neutrinos around a black hole. Dear Professor Jim Al-Khalifi,

If we believe that neutrinos do have a mass from the point of creation of the neutrino to the point of detection, as such they should react to gravity and would form an extremely dense layer of orbiting neutrinos around every black hole because of their immense speed and their superior numbers in this universe.
I wonder if anyone has found such a layer of orbiting neutrinos around a black hole.

]]> Comment on Faster than the speed of light? by Anthony Martin http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1764 Anthony Martin Tue, 22 Nov 2011 20:24:17 +0000 http://www.jimal-khalili.com/?p=1055#comment-1764 Some great replies to Jim's wonderful explanation and opinion. Some very funny replies too eg. Bob Lyons 'Oldtrinos'! I liked Steve Jone's question..' Now what would happen if it was possible for a particle to have negative mass…'. It's certainly an interesting notion to contemplate this experimental data as being 'correct'. In science nothing is ruled out or, closed to reinvestigation no matter the historical crowns of achievements. The 'measurement problem' here is so open to variations and unknown,s it's a sure bet that it may manifest to explain the apparent 'anomaly'. But... I hope not! I can't wait to hear how further experimentations go and, the brilliant minds club together in trying to resolve this, if it's an abnormal reading. I have my own theories but, they are only speculations. Some great replies to Jim’s wonderful explanation and opinion.
Some very funny replies too eg. Bob Lyons ‘Oldtrinos’!
I liked Steve Jone’s question..’ Now what would happen if it was possible for a particle to have negative mass…’.
It’s certainly an interesting notion to contemplate this experimental data as being ‘correct’. In science nothing is ruled out or, closed to reinvestigation no matter the historical crowns of achievements.
The ‘measurement problem’ here is so open to variations and unknown,s it’s a sure bet that it may manifest to explain the apparent ‘anomaly’. But… I hope not!
I can’t wait to hear how further experimentations go and, the brilliant minds club together in trying to resolve this, if it’s an abnormal reading.
I have my own theories but, they are only speculations.

]]> Comment on Faster than the speed of light? by phayes http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1758 phayes Tue, 22 Nov 2011 14:59:42 +0000 http://www.jimal-khalili.com/?p=1055#comment-1758 Oops! I seem to have got the link syntax wrong. The diagram is on page 12 of this: http://arxiv.org/abs/gr-qc/0107091 Oops! I seem to have got the link syntax wrong. The diagram is on page 12 of this: http://arxiv.org/abs/gr-qc/0107091

]]> Comment on Faster than the speed of light? by phayes http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1757 phayes Tue, 22 Nov 2011 14:55:48 +0000 http://www.jimal-khalili.com/?p=1055#comment-1757 “But the causal chain involving free will only needs to apply in the shooter’s frame of reference.” The fact that it doesn't necessarily <em>is</em> the paradox! Consider a similar example: A shoots B in one inertial frame with a superluminal bullet. In another inertial frame, C passes B at the moment of B's demise and immediately shoots another superluminal bullet at A which reaches and kills A before A pulls/pulled the trigger. If you look at the spacetime diagram on page 12 of <a>this</a> you can see that such a paradoxical situation can be arranged if 'hard' superluminal motion is allowed. “But the causal chain involving free will only needs to apply in the shooter’s frame of reference.”

The fact that it doesn’t necessarily is the paradox! Consider a similar example: A shoots B in one inertial frame with a superluminal bullet. In another inertial frame, C passes B at the moment of B’s demise and immediately shoots another superluminal bullet at A which reaches and kills A before A pulls/pulled the trigger. If you look at the spacetime diagram on page 12 of this you can see that such a paradoxical situation can be arranged if ‘hard’ superluminal motion is allowed.

]]> Comment on Faster than the speed of light? by Neutrino fever produces media storm | usergadgets.com http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1752 Neutrino fever produces media storm | usergadgets.com Tue, 22 Nov 2011 06:49:11 +0000 http://www.jimal-khalili.com/?p=1055#comment-1752 [...] away, Al-Khalili’s inbox apparently overflowed with people demanding he follow through. As he blogged on Friday: “I have been prompted to write this blog, instead of chilling with a glass of wine [...] [...] away, Al-Khalili’s inbox apparently overflowed with people demanding he follow through. As he blogged on Friday: “I have been prompted to write this blog, instead of chilling with a glass of wine [...]

]]> Comment on Faster than the speed of light? by 22.11.2011 | Юлиян Попов http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1751 22.11.2011 | Юлиян Попов Tue, 22 Nov 2011 06:34:18 +0000 http://www.jimal-khalili.com/?p=1055#comment-1751 [...] http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html [...] [...] http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html [...]

]]> Comment on Faster than the speed of light? by Neutrino fever produces media storm | Journal of Technology and Economic Development | Future Technology | Green Technology | Military Technology | Business | Trading | Finance | Computer | Robots | Entertainment | Games | GPS | Software | Music Tech http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1747 Neutrino fever produces media storm | Journal of Technology and Economic Development | Future Technology | Green Technology | Military Technology | Business | Trading | Finance | Computer | Robots | Entertainment | Games | GPS | Software | Music Tech Mon, 21 Nov 2011 23:34:54 +0000 http://www.jimal-khalili.com/?p=1055#comment-1747 [...] away, Al-Khalili’s inbox apparently overflowed with people demanding he follow through. As he blogged on [...] [...] away, Al-Khalili’s inbox apparently overflowed with people demanding he follow through. As he blogged on [...]

]]> Comment on Faster than the speed of light? by hw looi http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1744 hw looi Mon, 21 Nov 2011 19:16:19 +0000 http://www.jimal-khalili.com/?p=1055#comment-1744 And I forgot to mention that the effects of the gravity in a vacuum come from the planets, stars and galaxies and not just from the minute amount of matter in the vacuum itself. If we assume that that the vacuum impedence of photons is 1 unit (the vacuum impedence of other electromagnetic forces = 376 ohms), then knowing the peculiar nature of neutrinos, the vacuum impedence of neutrinos is probably less than 1 unit and as such it has a great speed advantage. And I forgot to mention that the effects of the gravity in a vacuum come from the planets, stars and galaxies and not just from the minute amount of matter in the vacuum itself.
If we assume that that the vacuum impedence of photons is 1 unit (the vacuum impedence of other electromagnetic forces = 376 ohms), then knowing the peculiar nature of neutrinos, the vacuum impedence of neutrinos is probably less than 1 unit and as such it has a great speed advantage.

]]> Comment on Faster than the speed of light? by LenS http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1742 LenS Mon, 21 Nov 2011 17:18:04 +0000 http://www.jimal-khalili.com/?p=1055#comment-1742 Given that the timing side seems like it could be correct (atomic clocks, satellites etc) , what about the accuracy of the distance measurement. I just wondered how did they estimate the straight line distance through the Earth rather than around the curvature of the Earth's surface. I reckon about a 17.98 metres error would explain the speed anomaly. Given that the timing side seems like it could be correct (atomic clocks, satellites etc) ,
what about the accuracy of the distance measurement.
I just wondered how did they estimate the straight line distance through the Earth rather than around the curvature of the Earth’s surface.
I reckon about a 17.98 metres error would explain the speed anomaly.

]]> Comment on Faster than the speed of light? by John O'Reilly http://www.jimal-khalili.com/blog/faster-than-the-speed-of-light.html#comment-1739 John O'Reilly Mon, 21 Nov 2011 06:42:21 +0000 http://www.jimal-khalili.com/?p=1055#comment-1739 Hey Jim, how do you like your shorts cooked? Rare, medium, or well done? Hey Jim, how do you like your shorts cooked? Rare, medium, or well done?

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