24 mars 2017 kl. 16:25 skrev Krassimir Markov <mar...@foibg.com<mailto:mar...@foibg.com>>:
Dear Arturo and FIS Colleagues, Let me remember that: The basic misunderstanding that non-living objects could “exchange information” leads to many principal theoretical as well as psychological faults. For instance, photon could exchange only energy and/or reflections ! Sorry for this n-th my remark ... Friendly greetings Krassimir And let me add: a photon is not something that can exchange information, or energy or anything whatsoever. A photon is portion of electromagnetic radiation, it comes into exitence when a material object decreases its energy and is destroyed when another (or the same) material object absorbs that portion. A photon cannot increase its energy, or decrease it. And, of course, we cannot attribute information or information change to it. Furthermore, as was proved by Gegerfeldt and Malament quite some time ago, a particle interpretation of quantum electro dynmaics is impossible. So thinking that a photon is confined to well defined portion of spacetime contradicts QED. cheers Lars-Göran From: tozziart...@libero.it<mailto:tozziart...@libero.it> Sent: Friday, March 24, 2017 4:52 PM To: fis@listas.unizar.es<mailto:fis@listas.unizar.es> Subject: [Fis] I: Re: Is information truly important? Dear Lars-Göran, I prefer to use asap my second FIS bullet, therefore it will be my last FIS mail for the next days. First of all, in special relativity, an observer is NOT by definition a material object that can receive and store incoming energy from other objects. In special relativity, an observer is a frame of reference from which a set of objects or events are being measured. Speaking of an observer is not specifically hypothesizing an individual person who is experiencing events, but rather it is a particular mathematical context which objects and events are to be evaluated from. The effects of special relativity occur whether or not there is a "material object that can recieve and store incoming energy from other objects" within the inertial reference frame to witness them. Furthermore, take a photon (traveling at speed light) that crosses a cosmic zone close to the sun. The photon "detects" (and therefore can interact with) a huge sun surface (because of its high speed), while we humans on the Earth "detect" (and can interact with) a much smaller sun surface. Therefore, the photon may exchange more information with the sun than the humans on the Earth: both the photon and the humans interact with the same sun, but they "detect" different surfaces, and therefore they may exchange with the sun a different information content. If we also take into account that the photon detects an almost infinite, fixed time, this means once again that it can exchange much more information with the sun than we humans can. In sum, once again, information does not seem to be a physical quantity, rather just a very subjective measure, depending on the speed and of the time of the "observer". Arturo Tozzi AA Professor Physics, University North Texas Pediatrician ASL Na2Nord, Italy Comput Intell Lab, University Manitoba http://arturotozzi.webnode.it/ ----Messaggio originale---- Da: "Lars-Göran Johansson" <lars-goran.johans...@filosofi.uu.se<mailto:lars-goran.johans...@filosofi.uu.se>> Data: 24/03/2017 14.50 A: "tozziart...@libero.it<mailto:tozziart...@libero.it>"<tozziart...@libero.it<mailto:tozziart...@libero.it>> Ogg: Re: [Fis] Is information truly important? 24 mars 2017 kl. 13:15 skrev tozziart...@libero.it<mailto:tozziart...@libero.it>: Dear Fisers, a big doubt... We know that the information of a 3D black hole is proportional to its 2D horizon, according to the Bekenstein-Hawking equations. However, an hypotetical observer traveling at light speed (who watches a black hole at rest) detects a very large black hole horizon, due to Einstein's equations. Therefore, he detects more information from the black hole than an observer at rest, who sees a smaller horizon… An observer is by definition a material object that can recieve and store incoming energy from other objects. Since it requires infinite energy to accelerate even a slighest object to the velocity of light, no observer can travel at the speed of light. That means that your thought experiment is based in inconsistent assumptions and no vaild conclusions from them can be drawn. Lars-Göran Johansson In sum, information does not seem to be a physical quantity, rather just a very subjective measure... Arturo Tozzi AA Professor Physics, University North Texas Pediatrician ASL Na2Nord, Italy Comput Intell Lab, University Manitoba http://arturotozzi.webnode.it/ _______________________________________________ Fis mailing list Fis@listas.unizar.es<mailto:Fis@listas.unizar.es> http://listas.unizar.es/cgi-bin/mailman/listinfo/fis Lars-Göran Johansson lars-goran.johans...@filosofi.uu.se<mailto:lars-goran.johans...@filosofi.uu.se> 0701-679178 ________________________________ _______________________________________________ Fis mailing list Fis@listas.unizar.es<mailto:Fis@listas.unizar.es> http://listas.unizar.es/cgi-bin/mailman/listinfo/fis _______________________________________________ Fis mailing list Fis@listas.unizar.es<mailto:Fis@listas.unizar.es> http://listas.unizar.es/cgi-bin/mailman/listinfo/fis Lars-Göran Johansson lars-goran.johans...@filosofi.uu.se<mailto:lars-goran.johans...@filosofi.uu.se> 0701-679178
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