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Groups > sci.physics.relativity > #382242
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Newsgroups | sci.physics.relativity |
| Subject | Re: Particle Physics |
| Date | 2016-04-25 06:55 +0200 |
| Message-ID | <do5marFghajU1@mid.individual.net> (permalink) |
| References | (5 earlier) <a8idnSKNzdWW8ofKnZ2dnUU7_83NnZ2d@giganews.com> <dnvftkFua8vU1@mid.individual.net> <c5ednXkxJcMPcYbKnZ2dnUU7_8zNnZ2d@giganews.com> <do334oFqve3U1@mid.individual.net> <nfj58j$1bb3$6@gioia.aioe.org> |
Am 24.04.2016 21:02, schrieb Odd Bodkin: > On 4/24/2016 12:16 AM, Thomas Heger wrote: >> You want to use units against their intended purpose and measure length >> with a clock and time with a meter stick. > > And what do you think the "intended purpose" of units is? > > Be REALLY careful with what you answer, and be sure you base it on what > scientists actually say, not your own opinion. > Units have an idea to what they shall express. The concept behind the term 'length' stems from common observations, we have as human beings, living on planet Earth: The movement from one spot to the other requires a number of steps. If we make '1 step' a unit, then the counting of steps would be sufficient to measure the distance between spot A und spot B upon the surface of Earth. Now '1 Step' was not really useful, since all people have different legs and make different steps. This problem was 'solved' by 'length of the King's feet'. Since England, Egypt, Prussia and the USA had different Emperors, the feet was different in different nations. Then came Napoleon and replaced 'Royal feet' with 'the meter'. This was defined by a Platinum bar in Paris. Now smart Physicists came along, and wanted something more precise and not as expensive as that Platinum bar. So they used light to define the meter, but oriented their definition on that Platinum bar in Paris. With this light it and the definition of 'length' it was now possible to measure other distance, in directions, into which you cannot walk (like to the Moon). But the concept was inherited from counting steps on a journey upon the surface of planet Earth, only generalised into other directions and measurement by other means than comparing length to the own limbs. TH
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Particle Physics Carl Susumu <numbernumber1212@gmail.com> - 2016-04-21 17:09 -0700
Re: Particle Physics Gary Harnagel <hitlong@yahoo.com> - 2016-04-21 19:42 -0700
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-22 06:42 +0200
Re: Particle Physics Odd Bodkin <bodkinodd@gmail.com> - 2016-04-22 07:14 -0500
Re: Particle Physics David Fuller <fuller.david@hotmail.com> - 2016-04-22 07:01 -0700
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-22 19:49 +0200
Re: Particle Physics Odd Bodkin <bodkinodd@gmail.com> - 2016-04-22 13:06 -0500
Re: Particle Physics Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-04-23 01:37 +0200
Re: Particle Physics Tom Roberts <tjroberts137@sbcglobal.net> - 2016-04-22 13:35 -0500
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-22 22:29 +0200
Re: Particle Physics Dirk Van de moortel <dirkvandemoortel@hotspam.not> - 2016-04-22 23:32 +0200
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-23 06:15 +0200
Re: Particle Physics JanPB <filmart@gmail.com> - 2016-04-22 22:25 -0700
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-23 23:18 +0200
Re: Particle Physics Odd Bodkin <bodkinodd@gmail.com> - 2016-04-24 13:55 -0500
Re: Particle Physics Odd Bodkin <bodkinodd@gmail.com> - 2016-04-23 08:33 -0500
Re: Particle Physics Dirk Van de moortel <dirkvandemoortel@hotspam.not> - 2016-04-23 15:53 +0200
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-23 20:36 +0200
Re: Particle Physics Odd Bodkin <bodkinodd@gmail.com> - 2016-04-24 13:59 -0500
Re: Particle Physics Tom Roberts <tjroberts137@sbcglobal.net> - 2016-04-23 16:43 -0500
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-24 07:16 +0200
Re: Particle Physics Odd Bodkin <bodkinodd@gmail.com> - 2016-04-24 14:02 -0500
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-25 06:55 +0200
Re: Particle Physics Odd Bodkin <bodkinodd@gmail.com> - 2016-04-25 06:07 -0500
Re: Particle Physics Thomas Heger <ttt_heg@web.de> - 2016-04-26 22:24 +0200
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