energy and mass (was: usenet weirdness)

From	ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups	sci.electronics.design, sci.physics
Subject	energy and mass (was: usenet weirdness)
Followup-To	sci.physics
Date	2026-02-10 21:58 +0000
Organization	Stefan Ram
Message-ID	<rays-20260210224721_-_@ram.dialup.fu-berlin.de> (permalink)
References	<8e7kokl9hospneh83uskr9otk6kquvvfn8@4ax.com> <10mf1bs$3i2mv$1@dont-email.me> <unjmok9s04334vnjsmv47innf128fok6mv@4ax.com> <10mg425$3v2e1$1@dont-email.me> <t69nokpdl0n1n2mn3ghohe4ss84j4jinbu@4ax.com>

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Followups directed to: sci.physics

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john larkin <jl@glen--canyon.com> wrote or quoted:
>Two gamma rays (zero mass total) can collide to produce a particle
>pair (which has mass.)

  Let's call the momenta of the two photons p0 and p1.

  We may assume p1 = -p0 as the two photons are moving towards
  each other from opposite directions. Let's call the momentum
  of the system of these two photons "p", then we have:

p = p0 + p1 = p0 +( -p0 )= p0 - p0 = 0

  . Let's call the energy of this pair "E" and its mass "m". From

E^2 = m^2 + p^2

  (in units with c=1) and 

p = 0

  , we get,

E^2 = m^2

  for the pair. I.e., all its energy is mass. And this is the
  mass the particle pair has after the collision.

Newsgroups: sci.electronics.design,sci.physics
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energy and mass (was: usenet weirdness) ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-10 21:58 +0000
  Re: energy and mass (was: usenet weirdness) john larkin <jl@glen--canyon.com> - 2026-02-10 15:07 -0800
    Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-10 23:47 +0000
      Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 02:41 +0100
      Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-12 02:43 +0100
  Re: energy and mass (was: usenet weirdness) john larkin <jl@glen--canyon.com> - 2026-02-10 15:49 -0800
    Re: energy and mass (was: usenet weirdness) Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-02-11 01:19 +0000
      Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-11 16:32 +0100
    Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-11 15:23 +0100
      Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-11 17:21 +0100
      Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-17 10:34 -0800
        post-maturity brain damages in Ross Finalyson. (Re: energy and mass Mild Shock <janburse@fastmail.fm> - 2026-02-24 13:43 +0100
          Give this man an IQ booster, his brain is defaulting (Was: post-maturity brain damages in Ross Finalyson.) Mild Shock <janburse@fastmail.fm> - 2026-02-24 21:18 +0100
      Re: energy and mass Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-02-18 12:30 -0800
    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 Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 03:17 +1100
      Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-13 16:20 +0000
        Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-14 07:20 +1100
          Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-14 03:31 +0100
        Re: energy and mass Jeroen Belleman <jeroen@nospam.please> - 2026-02-13 21:50 +0100
          Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-13 15:03 -0800
            Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-13 23:35 +0000
              Re: energy and mass Jeroen Belleman <jeroen@nospam.please> - 2026-02-14 10:47 +0100
                Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-14 15:21 +0100
                Re: energy and mass Bill Sloman <bill.sloman@ieee.org> - 2026-02-15 02:46 +1100
                Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-15 01:24 +0100
                Re: energy and mass Jeremiah Jones <jj@j.j> - 2026-02-17 20:03 -0800
                Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-14 07:58 -0800
                Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-14 07:54 -0800
                Re: energy and mass Jeroen Belleman <jeroen@nospam.please> - 2026-02-14 18:01 +0100
                Re: energy and mass Gerhard Hoffmann <dk4xp@arcor.de> - 2026-02-14 20:52 +0100
                Re: energy and mass ram@zedat.fu-berlin.de (Stefan Ram) - 2026-02-15 17:20 +0000
              Re: energy and mass x <x@x.net> - 2026-02-14 15:38 -0800
                Re: energy and mass john larkin <jl@glen--canyon.com> - 2026-02-27 19:48 -0800
          Re: energy and mass Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-02-14 03:36 +0100
  Re: energy and mass Python <python@cccp.invalid> - 2026-02-20 14:27 +0000

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