Path: csiph.com!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: The Starmaker Newsgroups: sci.physics.relativity Subject: Re: What is "local =?UTF-8?Q?time=22=3F?= Date: Fri, 18 Oct 2024 11:03:04 -0700 Organization: The Starmaker Organization Lines: 112 Message-ID: <6712A2D8.4E50@ix.netcom.com> References: <4P8P35rGVs_krWmhPcI_Wdi0QP0@jntp> <670FD270.5F20@ix.netcom.com> Reply-To: starmaker@ix.netcom.com MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Injection-Date: Fri, 18 Oct 2024 20:02:59 +0200 (CEST) Injection-Info: dont-email.me; posting-host="1c806cf7a6ac03ae93969c9ac7d11173"; logging-data="3579911"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+pdOfo1Dkt2azfUnhVfmxh8Ii5L0YuvqM=" Cancel-Lock: sha1:JYUjrx7Q61P0sehhnx9UkcD8+Js= X-Mailer: Mozilla 3.04Gold (WinNT; U) X-Antivirus: Avast (VPS 241018-6, 10/18/2024), Outbound message X-Antivirus-Status: Clean Xref: csiph.com sci.physics.relativity:658121 The Starmaker wrote: > > Richard Hachel wrote: > > > > Le 16/10/2024 à 11:03, Mikko a écrit : > > > On 2024-10-14 11:28:45 +0000, Richard Hachel said: > > > > > >> What is "local time" in relativity? > > > > > > The expression is usually not used in Relativity. In particular, > > > Einstein did not use it. > > > > You may be right. > > For my part, I firmly believe that a lot of words or concepts should be > > completely abandoned. > > This will make many relativity lovers jump, I think, but I think it is > > "necessary for the song" and that one day, we will have to go through it. > > Example of words or concepts that are TOTALLY useless, even biased. > > "local time", "relativity of simultaneity by change of reference frame", > > "local present time", "hypercone of present time", > > "invariance of the space-time interval", "time-gap": we don't need all of > > this. > > At best, it is useless, at worst it is false. > > And this is only part of the horror that misunderstood RR has become, and > > I am not even talking about uniformly accelerated media and rotating > > media. > > The RR that should remain compatible is so much no longer compatible that > > we are forced to talk about RG to sweep the dust under the carpet. > > The same goes for a simple Langevin in apparent speed, it is so ridiculous > > that we are forced to evade this question, and that no one except me is > > capable of drawing a simple little space-time diagram for the two > > protagonists where the lines of simultaneity are horizontal in the present > > time hyperplane of each. > > All this is absurd. > > How many more years or decades before all these stupid notions jump out of > > the textbooks? > > > > R.H. > > I thought I made myself clear what "local time" is? > > "local time" in Albert's Einstein mind is "present time". > > When Albert Einstein says "present time", he means what you calls > ..."local time". > > If I'm in Los Angeles, and you're in Paris, I will ask you > > "What time is it there now?" > > What am I asking? I'm asking what is the local time. > > "What time is it there now?" > > The operative word is..."there". > > "What time is it *there* now?" > > "there" means 'local time' and also means 'present time' (in Einstein's > frame of referance) > > "present time" means here and there. > > in a particular place. > > synonyms: here, there, near, nearby, at hand, close/near at > https://www.google.com/search?hl=en&source=hp&biw=&bih=&q=define+present > > But I don't want to know what time is it ...here, there, now... > > I want to know what time is it now...everywhere! > > "everywhere"! > > Do you know where ...everywhere IS???? > > Or do I need to show you where is it at? > > You're everywhere. > > You're IN everywhere. > > I want to know what time is it now...everywhere! > > What time is it now...everyehre. > > Not here > not there... > > but > > EVERYWHERE!!!! The first 3 seconds of the big bang occured...everywhere. The first second...everywhere. an hour later..it's still everywhere. Now, i don't know hom many seconds has passed since the first second of the big bang, but total it and you will have the accurate time of what time it is now. -- The Starmaker -- To question the unquestionable, ask the unaskable, to think the unthinkable, mention the unmentionable, say the unsayable, and challenge the unchallengeable.