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From: "Paul.B.Andersen" <relativity@paulba.no>
Newsgroups: sci.physics.relativity
Subject: Re: Steel Man of Einstein & Relativity.
Date: Mon, 9 Sep 2024 21:24:37 +0200
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Den 09.09.2024 14:13, skrev Richard Hachel:
> 
> As for two things: the curvature of the sun's rays in the perisolar 
> atmosphere, in view of the enormous ejections of matter and gas that we 
> see, is it not precisely due to diffractive effects?

GR predicts that the gravitational deflection of em-radiation
by the Sun, observed from the Earth, is:

    θ = 2GM/(AU⋅c²)⋅(1+cosφ)/sinφ

Where:
  AU= an astronomical unit (distance Sun-Earth)
  φ = angle Sun-Earth as observed from the Earth
  c = speed of light in vacuum
  G = Gravitational constant
  M = solar mass

This equation predicts that when φ is 90⁰, θ = 0.0041".
The beam that hits the Earth will then be 1 AU from
the Sun at it's closest approach to the Sun.
(Like the Earth) Not much gas there, do you think?

These predictions of GR are thoroughly experimentally confirmed:
(even for angles Earth-Sun > 90⁰)

https://paulba.no/paper/PPN_gamma_Hipparcos.pdf
https://paulba.no/paper/PPN_gamma_Cassini.pdf
https://paulba.no/paper/Shapiro_2004.pdf
https://paulba.no/paper/GravDeflection.pdf
https://paulba.no/paper/Fomalont.pdf
https://paulba.no/paper/PPN_gamma_Cassini_2.pdf

You must understand that GR's predictions for gravitational
deflection of em-radiation are so thoroughly confirmed that
there is no room for doubt.

See also:
https://paulba.no/Deflection.html
https://paulba.no/pdf/GravitationalDeflection.pdf

> Finally, the precession of Mercury's perihelion... Isn't a 
> simple RR effect possible? Either because time does not pass in the same 
> way (Mercury's faster speed), or because in Mercury's frame of 
> reference, the Sun performs a revolution different from the reciprocal 
> (since the frame of reference is no longer quite the same).

No.

https://paulba.no/PerihelionAdvance.html
https://paulba.no/pdf/GRPerihelionAdvance.pdf

You are trying to "think for yourself" to find naive solutions
to problems physicist have solved and tested experimentally
a long time ago.

Maybe you should read and learn what physicists have written in
stead of claiming that all physicists are idiots and not worth reading?

---
Paul

https://paulba.no/