Path: ...!3.eu.feeder.erje.net!feeder.erje.net!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Python Newsgroups: sci.physics.relativity Subject: Re: [SR and synchronization] Cognitive Dissonances and Mental Blockage Date: Tue, 27 Aug 2024 10:48:25 +0200 Organization: CCCP Lines: 72 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Tue, 27 Aug 2024 10:48:27 +0200 (CEST) Injection-Info: dont-email.me; posting-host="f25627d19461a13182a502fc6818a371"; logging-data="3074926"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/RPn6ClRzt731Ru5qo9KOd" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:HLXQZh1KktNeDjhW0UDYJiL5GEU= In-Reply-To: Content-Language: en-US Bytes: 3930 Le 27/08/2024 à 07:41, Thomas Heger a écrit : > Am Montag000026, 26.08.2024 um 12:14 schrieb Richard Hachel: >> Le 26/08/2024 à 07:47, Thomas Heger a écrit : >>> >>> To illustrate the problem of Einstein's naming conventions, I write >>> now, what these names actually meant: >>> >>> >>> K is a cartesian coordinate system, assumed to be at rest, >>> non-rotating and unaccelerated in an Euclidean space, which is >>> assumed to 'flat' and force free. >>> >>> The orientations of the axes (of x, y and z) were not mentioned, but >>> I use this setting: >>> x points right >>> y points 'inside' (if x and z define a two-dimensional plane, like >>> the one you draw on) >>> z points up (because z is usually used for hight) >>> >>> >>> k is an equally normed coordinate system, which moves with velocity v >>> along the x-axis of K 'to the right'. The coordinates had Greek >>> letters as names (xsi, eta, zeta). >>> >>> >>> K' is a coordinate system with the same features as K, but which >>> moves from the center of k along the xsi-axis of k 'to the left' with >>> velocity -v >>> >>> >>> k' is the same, but moving to the left with velocity -w along the >>> xsi-axis of k. (the difference between K' and k' is a diffent >>> velocity w in case of k'). >>> >>> >>> But how could possibly anybody interpret the names K, k, K' and k' in >>> this way? >>> >>> It required careful investigations to find out, what was actually meant. >>> >>> And the used names themselves gave absolutely no hints, about how >>> these symbols shall be interpreted. >>> >>> In short: it is a very obscure system to name things! >>> >>> Usually you need to find a way, by which things get names in a >>> consistent manner, which the reader could eventually remember >> >> What you say is very interesting. >> > Well, thanks. > > But this isn't such a nice story at all. > > In a way this problem with naming coordinate systems was just the 'tip > of the iceberg'. > > But the reuse of symbols or -for instance- to define something one way, > but not sticking to this definition, are also observable. > > Especially annoying were the reuse of the letter A and the symbol x'. > > There were actually eight different uses for the tall latin 'A' in this > paper. > > But how could any reader keep track of the intended meaning in a certain > context? You certainly couldn't. But you are far below average.