Re: energy and mass

From	DJ Delorie <dj@delorie.com>
Newsgroups	sci.physics.relativity, sci.electronics.design
Subject	Re: energy and mass
References	(7 earlier) <10mkm4g$fm1r$1@gwaiyur.mb-net.net> <j3trokpcd3babrg58d4drbrtl8difoh00t@4ax.com> <1rqfmxt.jp4fr16u1qtvN%nospam@de-ster.demon.nl> <fk8sok1t8vbe7r6nhgl5v8eidkl7mnbcns@4ax.com> <mass-20260212201526@ram.dialup.fu-berlin.de>
Date	2026-02-12 15:50 -0500
Message-ID	<xna4xdit4q.fsf@delorie.com> (permalink)

Cross-posted to 2 groups.

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ram@zedat.fu-berlin.de (Stefan Ram) writes:
>   In general relativity, photons should attract each other, but
>   this effect should be very weak and should hardly be observable.

If the photons are travelling at the speed of light (duh) wouldn't time
dilation make any effect "over time" go to zero anyway?  I.e. it doesn't
matter how much photons attract each other if there's no time in which
to be affected by it.

(I am *not* an expert here)

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Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 14:55 +0100
  Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 14:58 +0100
  Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-12 07:43 -0800
    Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-12 16:23 +0000
      Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-12 08:44 -0800
        Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-12 17:15 +0000
          Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-13 13:45 +0000
        Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 05:12 +1100
          Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 20:26 +0100
            Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 15:56 +1100
              Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-14 14:17 +0100
            Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-14 13:56 +0100
              Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-14 09:39 -0800
                Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-14 09:40 -0800
      Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 22:08 +0100
        Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-13 10:07 -0800
      Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 22:57 +0100
        Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-13 10:11 -0800
      Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 00:33 +0100
    Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-12 19:39 +0100
      Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-12 11:04 -0800
        Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-12 19:22 +0000
          Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-12 20:16 +0000
          Re: energy and mass DJ Delorie <dj@delorie.com> - 2026-02-12 15:50 -0500
            Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-12 21:29 +0000
              Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 01:12 +0100
                Re: energy and mass DJ Delorie <dj@delorie.com> - 2026-02-12 20:59 -0500
                Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 03:15 +0100
                Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-13 11:27 +0100
                Re: energy and mass DJ Delorie <dj@delorie.com> - 2026-02-13 10:09 -0500
                Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 17:39 +0100
                Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-13 23:40 +0100
                Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-13 10:29 +0000
                Re: energy and mass DJ Delorie <dj@delorie.com> - 2026-02-13 10:21 -0500
                Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 17:34 +0100
              Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-21 15:24 +0000
            Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-12 23:12 +0100
            Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 23:27 +0100
        Re: energy and mass The Starmaker <starmaker@ix.netcom.com> - 2026-02-12 11:28 -0800
        Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-12 22:29 +0100
        Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 05:22 +1100
          Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 19:58 +0100
            Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 07:13 +1100
              Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-14 00:44 +0100
                Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-14 03:52 +0100
                Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-14 21:59 +0100
      Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-13 09:50 -0800
    Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 22:03 +0100
      Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-12 23:12 +0100
        Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 05:34 +1100
          Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-13 20:35 +0100
            Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-14 22:57 +0100
          Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-14 21:59 +0100
            Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-15 17:50 +1100
              Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-15 12:47 +0100
                Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-15 23:51 +1100
                Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-15 21:48 +0100
                Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-15 08:13 -0800
                Re: energy and mass nospam@de-ster.demon.nl (J. J. Lodder) - 2026-02-15 21:48 +0100
                Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-15 13:11 -0800
                Re: energy and mass Seymour Dobrov <ouo@yosdm.ru> - 2026-02-15 19:49 +0000
      Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-13 10:04 -0800
      Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-13 10:05 -0800
    Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 05:00 +1100
      Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-13 10:19 -0800

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