Path: csiph.com!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail From: Mike Fontenot Newsgroups: sci.physics.relativity Subject: Re: Einstein Explains the Twin Paradox Date: Thu, 14 Jan 2016 08:12:11 -0700 Organization: A noiseless patient Spider Lines: 25 Message-ID: <5697BACB.2010106@comcast.net> References: <9bcc91c8-b13d-458c-8453-91b462af86d1@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: mx02.eternal-september.org; posting-host="00bc74f54c98da548fc916185e136d45"; logging-data="15128"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX193/6M1cekJtfxZyyNjib8Y" User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 In-Reply-To: Cancel-Lock: sha1:4r8ukG2ba0R1vJuPtmNIUalHavE= Xref: csiph.com sci.physics.relativity:373934 On 1/14/16 6:53 AM, Paul B. Andersen wrote: > > In fact, it [the Twin Paradox result] can be calculated two different ways: >> >> http://www.npl.washington.edu/AV/altvw38.html >> > That's a very well-written reference. But there is an interesting and important issue regarding the twin paradox that goes beyond the question of which twin has aged by the end of the trip. That additional issue is whether the twin who accelerates can determine the current age of the unaccelerating twin at each of his own ages during his trip. And if so, how is that done? And does the unaccelerating twin agree with the accelerating twin's conclusions? The answers to these (and other) questions are answered in https://sites.google.com/site/cadoequation/cado-reference-frame "Accelerated Observers in Special Relativity", PHYSICS ESSAYS, December 1999, p629.