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From: clzb93ynxj@att.net (LaurenceClarkCrossen)
Newsgroups: sci.physics.relativity
Subject: Re: Relativity claims to have proven that parallel lines meet.
Date: Wed, 22 Jan 2025 18:04:37 +0000
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On Wed, 22 Jan 2025 14:07:23 +0000, Paul.B.Andersen wrote:

> Den 22.01.2025 07:09, skrev LaurenceClarkCrossen:
>> Thank you, but the refraction of sunlight that keeps the Sun visible
>> after astronomical sunset and the bending of starlight during an eclipse
>> are not perspectival or illusions.
>
> Have you still not learned the difference between
> refraction and gravitational deflection, Laurence?
>
> Do you remember that you made fool of yourself when
> you claimed that Poor said that Einstein's equation
> was "a refraction formula"?
> What Poor said was:
> "The mathematical formula, by which Einstein calculated his
>   deflection of 1.75 seconds for light rays passing the edge
>   of the sun, is a well known and simple formula of physical optics"
>
> The equation Θ = 4GM/Δ⋅c² is a gravitational deflection formula,
> but since you think it is "a refraction formula" you can
> try to use it to explain why the Sun is seen above the horizon
> when it really is below it. Good luck! :-D
Einstein claimed to have gotten the doubling by using Huygens's
principle, which is about refraction.