Path: csiph.com!news.mixmin.net!weretis.net!feeder1.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Thomas 'PointedEars' Lahn Newsgroups: comp.lang.python Subject: Photon mass (was: [Still off-top] Physics) Supersedes: <3593781.Z9z5BFKUBZ@PointedEars.de> Followup-To: sci.physics.relativity Date: Sat, 05 Mar 2016 16:46:04 +0100 Organization: PointedEars Software (PES) Lines: 22 Message-ID: <48577729.oWGijJaW9W@PointedEars.de> References: <56d16e6a$0$1593$c3e8da3$5496439d@news.astraweb.com> Reply-To: Thomas 'PointedEars' Lahn Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8Bit X-Trace: solani.org 1457192765 9195 eJwFwYEBgDAIA7CXHKMVzkGg/59ggsvDfp2gQ9DTlM71AmXVmC+iOGs7hbiLiMxOF1bWsT8uFBHf (5 Mar 2016 15:46:05 GMT) X-Complaints-To: abuse@news.solani.org NNTP-Posting-Date: Sat, 5 Mar 2016 15:46:05 +0000 (UTC) User-Agent: KNode/4.14.2 Cancel-Key: sha1:2vJV0NRNFEAucOV1EU5eqpofmzg= X-User-ID: eJwNxsEBwCAIA8CVBAyUcQDN/iPYex3MxSe2wzcIylcDPRtKUrM6tLgqSyftLFiLtiBjDSUQPIr+d8c4wH1c6xXo Cancel-Lock: sha1:lrAKmlP55UEFaBcAjn04meW2YDw= X-NNTP-Posting-Host: eJwFwYEBwCAIA7CXRGiBc4ba/09YAqfxZBAMCGIXb2dp1/MxX5ZrT02kvq4Ic2GQfim9PvMDBGwQwA== Xref: csiph.com comp.lang.python:104102 Gene Heskett wrote: > I've never heard of a massless photon, That is unfortunate as it should be common knowledge by now. > and they do exert a push on the surface they are reflected from, […] Photons exert a force on surfaces because they carry *momentum* or, as it had been understood in terminology that is obsolete now, a non-zero “*relativistic* mass” (that had been distinguished from “rest mass”). F'up2 sci.physics.relativity -- PointedEars Twitter: @PointedEars2 Please do not cc me. / Bitte keine Kopien per E-Mail.