🚀 go-pugleaf

On Feb 6, 1:54 pm, Randy Poe <poespam-t...@yahoo.com> wrote:
> On Feb 6, 12:39 pm, Albertito <albertito1...@gmail.com> wrote:
>
>
>
> > On 6 feb, 16:48, "Androcles" <Headmas...@Hogwarts.physics> wrote:
>
> > > <srp2...@gmail.com> wrote in message
>
> > >news:4695358e-db97-4485-94b4-06f417a451d4@i7g2000prf.googlegroups.com...
> > > On 6 fév, 02:34, Pentcho Valev <pva...@yahoo.com> wrote:
>
> > > >http://philipball.blogspot.com/2007/09/arthur-eddington-was-innocent-...
> > > > "With the technology then available, measuring the bending of
> > > > starlight was very challenging. And contrary to popular belief,
> > > > Newtonian physics did not predict that light would remain undeflected
> > > > - Einstein himself pointed out in 1911 that Newtonian gravity should
> > > > cause some deviation too. So the matter was not that of an all-or-
> > > > nothing shift in stars' positions, but hinged on the exact numbers."
>
> > > | Right.
>
> > > | Classical Newtonian mechanics predicts that light will bend with
> > > | twice the angle observed.
>
> > > How?
>
> > I'll tell you how. In order to see how newtonian gravity can
> > bend the trajectory of a photon, relativists fake it. They
> > magically tranform a photon with energy E into a particle
> > with mass m = E/2c^2, it is saying  half the mass in E = mc^2.
> > Then, relativists assume that particle passes by the massive
> > body from infinity travelling locally at c, and then they can
> > apply newtonian gravity to see how its trajectory is deflected
> > into a hyperbolic one. As a result there is a deflection angle
> > twice the observed one. A particle with mass m = E/c^2,
> > travelling locally at c from infinity, would be deflected in
> > the correct angle, under newtonian gravity.
>
> Why don't you do the Newtonian calculation before
> making this claim?

I'll give you a hint: When you have a mass moving
under the influence of a much heavier mass (say, a
planet moving under the influence of the sun, or
a moon moving around the planet), does anything in
the orbit depend on the mass of the lighter object?

That is, if the moon's mass were half what it is,
would it have a different path around the earth?

If you started a satellite in orbit around the
earth, and another satellite with half the mass in
the same starting orbit, would they continue in
the same orbit?

If you fire a projectile from a gun, and then
another with the same initial velocity but half
the mass, does it follow a different path (neglecting
air resistance)?

Once you've pondered that, decide whether you really
believe that two particles with different mass but
the same starting trajectory as they approach the
sun follow different paths.

               - Randy