Blog Ekkehard Friebe

Nachstehend bringe ich einen weiteren Beitrag von Rothwell Bronrowan (Germany).

Quelle: http://www.wbabin.net/weuro/bronrowan5.pdf

Zitat:

The Dubious Origins of E=mc²
Rothwell Bronrowan  physbron@t-online.de

This paper gives the derivation of E=mc². It also raises serious doubts as to the validity of the equation. This is not actually a paper I ever intended writing! All I wanted initially was to check again quickly on why c was involved in Einstein’s famous formula in the first place. But this wasn’t easy!
I found a number of articles in the Web beginning with statements like „… a full explanation would be too complex.“ Not what I wanted.
Then there were those that claimed to give something like the easiest, fastest or simplest explanation, but usually also began with something like, „Imagine an object travelling at almost the speed of light …“ Not what I wanted either!  So eventually I dug out an old Encyclopaedia Britannica – and found pretty much what I was looking for, fairly well written, on less than 3 pages.

I’ll now give a very short summary, in my own words, of the essential contents of the Britannica article, until we arrive at E=mc². This will be followed by a more detailed analysis. Anyone therefore wishing to skip this segment can readily do so.

Treating the historical aspects of relativity, the Britannica article begins with Newton and moves on to Ørsted, Faraday, Maxwell and Hertz, before arriving at Michelson and Morley and a brief outline of their experiment.

FitzGerald and Lorentz are next brought into the picture and their independently-found „solution“ to the unexpected zero result of the Michelson-Morley experiment, namely length contraction, is introduced. The amount of foreshortening is given as being equivalent to the factor (1-v²/c²)^1/2, which is the same as square root of (1-v²/c²). [1]

This factor is then also said to be responsible for clock-slowing (time dilation).

Einstein is next introduced and the findings of FitzGerald and Lorentz are given a newinterpretation in the context of observers with different inertial frames of inference, the mathematical equations relating the space and time measurements of one observer to those of the other being indicated in terms of the Lorentz transformations:
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[1] The factor is actually the inverse of that initially quoted in Encyclopaedia Britannica.

(Zitatende) Lesen Sie bitte hier weiter!

Beste Grüße Ekkehard Friebe