Re: The Shapiro's experiment HOAX. A 1968 TIME article.

rhertz <hertz778@gmail.com> wrote:

On Mon, 21 Oct 2024 16:52:16 +0000, LaurenceClarkCrossen wrote:
 

Mr. Hertz: The eclipse experiment showed double Newtonian. The
Pound-Snider showed Newtonian. What does Shapiro show?

 
Shapiro called his experiment the 4th. test of general relativity.
 
I assume that the former three were:
 
1. TEORETICAL: 1915 Einstein's paper on Mercury perihelion advance.
2. EXPERIMENTAL: 1919 Eddington's experiment of starlight deflection by
Sun's gravity.
3. EXPERIMENTAL: 1961 Pound-Rebka experiment using a 22 meters
trajectory of gamma rays generated by a radioactive Fe57 sample, SOME
without recoil in the atoms that generated them.
 
 
Shapiro's experiment was based on N°2, but transforming deflection angle
into a linearized light trajectory in a curved spacetime. He calculated
that light had to travel an extra amount of 68 Km when an MW beam was
reflected by Mercury, on the opposite side of the Sun.

You misunderstood that too.
Half the effect is gravitational time dilation.
For convenience in comparing with experiment
the total effect -is represented- as an effective extra path length.
(or time delay)

A powerful, narrow wide radar beam at 8Ghz was used to capture echos from
Mercury, more than 200 million Km far away. It was also used with Venus.
 
One of the problems in this conception is that GR doesn't contemplate
ANY relationship between curved spacetime and linear euclidean 3D space,
so the equations that Shapiro developed are QUESTIONABLE.
 
 
He replaced angular displacements by delays in the travel of light
through the allegedly curved spacetime.
 
You have to add more suspicious issues, like the extraction of the very
weak echo from a received signal highly contaminated with noise and
several degradations and perturbations (from the Sun and Earth itself).
 
The results were re-published after heavy computer-based post-processing
of received data, about one year after the 1971 paper.
 
Now, relativism has spread the myth that Shapiro's delay is essential
for interplanetary travel, as it's present at any distance from the Sun,
INFECTING space&time perception for anything even at 90" from the axis
center Sun-Center Earth (as computed from Earth).
 
I call Shapiro's delay (some microseconds) IRRELEVANT for space travels,
given the delay of light in the zone of tens of minutes for any deep
space probe. But relativists here are in negation state of mind (and
reason).

Those tens of minutes can be measured to nanosecond accuracy these days.
(by using transponders rather than radar echos)
Precise orbit determinations depends on it.
You are showing off your complete ignorance, once again,

Jan