On 6 feb, 16:48, "Androcles" wrote:
wrote in message

...
On 6 fév, 02:34, Pentcho Valev wrote:

http://philipball.blogspot.com/2007/...-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.