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Article #16378

Re: Speed of light is variable says Einstein

#16378
From: Oncle Dom
Date: Sun, 16 Sep 2007 18:37
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DDP3000@gmail.com dans son message
1187486327.521094.68680@w3g2000hsg.googlegroups.com,
nous a fait l'honneur d'�crire:
> Measured light speeds:
> Birge, 1929, 299.796 km/sec
> Mittelstaedt, 1928, 299.778+-20
> Michelson et al., 1932, 299.774+-11
Michelson died on 1931
alii were Pease and Pearson

> Michelson et al., 1935, 299.774+-4
> Anderson, 1937, 299.771+-10
> Huttel, 1940, 299.771+-10
> Anderson, 1941, 299.776+-6
> Birge, 1941, 299.776+-4
> Dorsey, 1945, 299.773+-10
Better mesures appears after 1947

> Since 1972 the speed of light is DEFINED at 299.792.458+-0.001, NOT
> measured. No effort to measure the speed will be made since then.
Some others mesasures were made, according to the BIPM

> Moreover, the meter and second are both defined based on the speed of
> light, so no change in the speed of light can be measured anymore!
Of course
The complete story since Emp�docle, is here
http://perso.orange.fr/oncle.dom/astronomie/histoire/mesure_de_c/mesure_
c.htm
--
Oncle Dom
_________
http://perso.orange.fr/oncle.dom/
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From: "Oncle Dom" <dom.caudron@wanaNULLdoo.fr>
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Subject: Re: Speed of light is variable says Einstein
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