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   sci.physics.relativity      The theory of relativity      225,861 messages   

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   Message 225,056 of 225,861   
   Paul B. Andersen to All   
   Re: Gravitational redshift/blueshift   
   04 Dec 25 10:48:54   
   
   From: relativity@paulba.no   
      
   Den 03.12.2025 23:25, skrev Paul B. Andersen:   
   >   
   > ds² = - c²dτ² = -(1 − 2GM/[c²r])c²dt² + 1/(1 − 2GM/[c²r])dr²   
   >                        + r² (dθ² + sin² θ dφ)   
   > Which is correct.   
   >   
   > When s² < 0 and thus time like, then  (-c²τ²) < 0 and thus time like.   
   >   
   > So : ds² = -(1 − 2GM/[c²r])c²dt² + 1/(1 − 2GM/[c²r])dr²   
   >                        + r² (dθ² + sin² θ dφ)   
   > and: -c²dτ² = -(1 − 2GM/[c²r])c²dt² + 1/(1 − 2GM/[c²r])dr²   
   >                       + r² (dθ² + sin² θ dφ)   
   .. are the same metric.   
      
   --   
   Paul   
      
   https://paulba.no/   
      
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