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From: Mikko <mikko.levanto@iki.fi>
Newsgroups: sci.physics.relativity
Subject: Re: Does the Math Show A Doubling of the Gravitational Deflection of Starlight?
Date: Sun, 19 Jan 2025 14:50:03 +0200
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The answer to the subject line is "no". The math says that the gravitational
deflection is what the math used to say. But one mtehmatical method can say
that the defilection is twice what another mathematical method says. For
example, Newtons optics, which assumes that light is a stream of small
particles, predicts only half of the deflection than general Relativity.
A naive application of Maxwell's theory predicts that there is no defilection.

On 2025-01-18 21:40:26 +0000, LaurenceClarkCrossen said:

> No, because whatever the math, space is not a surface, so it cannot
> bend.

Nothing proves that space is not a hypersurface in a muli-dimensional
hyperpshere. But the math permits that it may be curved even without
any hyperspace.

> A boat sailing up and downstream takes longer than one sailing the same
> distance in a pond.

Also longer than sailing the same distance cross-stream and back.

> Contrary to what one may think, the math proves that.

With reasonable assumptions (in particular that the water surface is
Euclidean).

> Math cannot prove space curves.

Math cannot prove that space does not curve, either. But math can define
what "space is curved" means and how the curvature can be described and
quantifed.

> Einstein said he obtained the doubling by the "curving space."

In certain sense that is true.

> Math pages sums up by saying the doubling is from "curved space."

In the same sense.

-- 
Mikko