Talk:Emil Cohn

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Cohn didn't accept the ether?

Where exactly is it written or said that Cohn didn't believe in the existence of the ether? I can't believe that he said so before Einstein... —Preceding unsigned comment added by 77.3.114.79 (talk) 20:23, 13 July 2008 (UTC)[reply]

Regarding Cohn's rejection of the ether see the sources in the article (Miller, Darrigol, Janssen/Stachel). The relevant paper of Cohn is "Über die Gleichungen des elektromagnetischen Feldes für bewegte Körper" (1901). On p. 75 he wrote that one can define a vacuum, but not an ether. On p. 99 he identified the "ether" with the fixed stars. So he abandoned the classical, light carrying ether and called the ether a "metaphorical term".. --D.H (talk) 08:48, 14 July 2008 (UTC)[reply]

Picture

The only portrait of Emil Cohn (1884) I found is at the Bibliothèque nationale et universitaire (Strasbourg). Their Reproduction and printing page mentions a fee for publishing that photograph on the Internet, and a mention, which probably break Wikipedia's licensing terms. Can't Wikipedia get some kind of agreement with such kind of institutions? ale (talk) 11:49, 14 January 2013 (UTC)[reply]

namefellows

I think it should be mentioned that there are many namefellows "Emil Cohn", insofar more as this Emil G. Cohn is the only one mentioned on the Cohn disambiguation page. See for example the German page. — MFH:Talk 16:36, 27 June 2024 (UTC)[reply]