Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Thomas Heger Newsgroups: sci.physics.relativity Subject: Re: Proper Time of Light Date: Wed, 21 Sep 2016 05:32:56 +0200 Lines: 43 Message-ID: References: <84028e78-3760-4b05-98c9-6cbd58bd562b@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: individual.net 9C6GUCg1j5jnmA4tgzS43QCbOxJku3ql7fPE1rKzAjmclL6zK4 Cancel-Lock: sha1:W62dLM+tQq+t1n7FHdbACxAMsa8= User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:8.0) Gecko/20111105 Thunderbird/8.0 In-Reply-To: <84028e78-3760-4b05-98c9-6cbd58bd562b@googlegroups.com> Xref: csiph.com sci.physics.relativity:393172 Am 18.09.2016 07:00, schrieb dhave: > Hi all, > > I'm new to group. I received a Bachelor's in Physics over 20 years ago but ended up in software. I miss physics as I approach old fartism. I loved SR and Star Trek. One of the last exercises I did was to calculate what one would see on a trip from Earth to Alpha Centauri given a hypothetical 1g bang-bang acceleration. It was a trip. The universe Lorentz contracts along direction of travel, I think it came up to about 1/2 light year behind me, it approaches a pancake. Unfortunately, one cannot return to Earth and tell friends how cool that was. Rocket Man is a lonely job. > > The proper time of light is zero. The faster you go, the closer you approach this weirdness. I googled this question but most replies just said you can't reach c so you can't ask the question. This reminded me of the fellow who said Einstein's theories were inconceivable and Einstein replied that he had already conceived them. > I think this is correct. To kept the constancy of speed of light I use a certain trick: I allow different 'axis of time', which could have an angle towards each other. This angle is a rotation over a complex plane. Also velocity is an angle over the complex plane. The axis of time is the real axis and the imaginary axis is called 'spacelike'. This plane is 'multiplied by three', what raises the flat picture into volume. Then we have three perpendicular axis of time, which are the unit vectors of a certain kind of space, which we call 'spacetime'. What we call 'real space' is actually the past/future light cone of the observer. The observer serves also as zero-point in his particular FoR and so the hyperplane of the present is co-moving with the observer. The axis of time is now perpendicular to the hyperplane of the present, irrespective to where the observer is or how fast he moves. Around this axis we can construct a cone with an angle 45°, which represents c. This angle of 45° will always represent c, because space and time are defined this way. So the speed of light is constant. TH