Re: The Cost of Relativity

From: Androcles (androc1es_at_nospamblueyonder.co.uk)
Date: 07/14/04 

Date: Wed, 14 Jul 2004 16:30:58 GMT

"Tom Potter" <tdp@earthlink.net> wrote in message
news:2ll3i2Fe9ko6U1@uni-berlin.de...
|
| "Dirk Van de moortel" <dirkvandemoortel@ThankS-NO-SperM.hotmail.com> wrote
| in message news:40f53cf9@usenet01.boi.hp.com...
| >
| > "Tom Potter" <tdp@earthlink.net> wrote in message
| news:2lkrd5Fe33p1U2@uni-berlin.de...
| > >
| > > "Gregory L. Hansen" <glhansen@steel.ucs.indiana.edu> wrote in message
| > > news:cd1adv$gof$2@hood.uits.indiana.edu...
| >
| > [snip]
| >
| > > > A bunch of satellites updated once per day from ground stations.
| Without
| > > > the relativistic consideration, the error would drift by about a
| > > > kilometer per day between corrections.
| > >
| > > As I explained in a lengthy, explicit post
| > > on the GPS system several months ago,
| >
| > http://users.pandora.be/vdmoortel/dirk/Physics/Fumbles/FullHoles.html
|
| As my pappy used to say,
| "You get better information from the horses mouth,
| than from a horses ass."
|
| An old post of mine about the GPS system follows.
| Straight from the horses mouth.
|
| For more of my articles on the GPS system,
| do a Google search on "tom potter" and GPS.
|
| Of course, if you prefer getting stuff from a horses ass,
| by all means, visit Dork's web site.
|
| 1. Light travels at a constant speed
| of 299 792.458 meters per second
| in the absence of matter,
| and in media with sparse matter,
| such as the Earth's atmosphere.

Easy, Tom. Earth's atmosphere is thick stuff, not sparse at all. Heck, the
setting or rising sun is red, and light is refracted. If the horizon wasn't
so close, even the red light wouldn't penetrate. Water may look clear, but
the sunlight doesn't penetrate to ocean depths, it's dark down there.

| 2. Time interval measurements of E-M waves in air, and space,
| are equivalent to distance measurements.
|
| distance = time interval * C

Nope. distance = time interval * (c+v), where v is the relative speed of the
source, in the absence of a medium.
|
| 3. Synchronized clocks can be used to
| quantize the distance between the points
| by measuring the time it takes light/radio waves
| to travel from one point to another.

Only if v = 0.

Androcles.

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