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Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again?

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On Monday, December 3, 2018 at 2:32:59 PM UTC-8, Thomas 'PointedEars' Lahn wrote:
> Thomas 'PointedEars' Lahn wrote:
> > Special relativity (1905+) once introduced the notion of “relativistic mass”
> > 
> >   m_rel(v) = γ(v) m₀,
> > 
> > with m₀ the “rest mass”, by the equation E = m₀²c⁴ + p²c² = γ m₀ c² = m_rel
> > c².
> 
> Correction: E = √(m₀²c⁴ + p²c²) = γ m₀ c².
> 
>     [The energy–momentum relation as formulated by Paul Dirac in 1929
>      is equivalent to E² = m₀²c⁴ + p²c².]
> 
> > In that sense, light has no rest mass, but does have *relativistic*
> > mass m_rel = ℎ f/c².
> > 
> >     [One can see how this can be confusing, and that it contradicts the
> >      knowledge that the term produced by the Minkowski norm of the
> >      four-momentum that contains mass, −m²c², is the same regardless of the
> 
> −m₀²c², then.  (In the approach where there is only Lorentz-invariant mass:
> m = m₀.)
> 
> >      relative velocity.  Therefore, the notions of “rest mass” and
> >      “relativistic mass” are considered obsolete at least since Okun 1984.
> >      Einstein already deprecated it publicly in the 1940s.]
> > 
> > General relativity (1915+) provides a more complete, and I think more
> > convincing, picture than either of those approaches.  […]
> 
> -- 
> PointedEars
> 
> Twitter: @PointedEars2
> Please do not cc me. / Bitte keine Kopien per E-Mail.

Light never bends. Gravity is motion curving it.
Gravity motion curves.

Mitchell Raemsch

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Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-03 23:18 +0100
  Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-03 23:32 +0100
    Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? mitchrae3323@gmail.com - 2018-12-03 18:57 -0800
  Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? kenseto <setoken@att.net> - 2018-12-13 07:34 -0800
    Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Scott Richman <sunn@idhnonow.iv> - 2018-12-13 16:15 +0000
    Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-13 17:22 +0100
    Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? "Paul B. Andersen" <relativity@paulba.no> - 2018-12-13 19:38 +0100
    Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? JanPB <filmart@gmail.com> - 2018-12-13 11:05 -0800
      Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Scott Richman <sunn@idhnonow.iv> - 2018-12-13 19:10 +0000
        Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? JanPB <filmart@gmail.com> - 2018-12-13 13:20 -0800
          Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Scott Richman <sunn@idhnonow.iv> - 2018-12-13 22:53 +0000
            Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? mitchrae3323@gmail.com - 2018-12-13 15:59 -0800
              Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? mitchrae3323@gmail.com - 2018-12-13 16:01 -0800
                Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Scott Richman <sunn@idhnonow.iv> - 2018-12-15 19:15 +0000
                Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? mitchrae3323@gmail.com - 2018-12-15 11:41 -0800
      Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Koobee Wublee <koobee.wublee@gmail.com> - 2018-12-13 12:54 -0800
        Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? JanPB <filmart@gmail.com> - 2018-12-13 13:22 -0800
          Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Koobee Wublee <koobee.wublee@gmail.com> - 2018-12-13 13:49 -0800
  Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? mitchrae3323@gmail.com - 2018-12-13 11:24 -0800
  Re: Does Gravity Actually Bend Light? Or Are We Fooling Ourselves -- Again? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-12-15 15:18 +0100

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