Classic gravitational tests of post-Einsteinian theories

|

With the help of PPN formalism, gravity theories are confronted with the results of experiments in the solar system. The γ parameter in this formalism highlights the light deflection and the light delay. By calculations according to PPN, light deflection … Read More

Testing the relativistic theories of gravity

|

Clifford M. Will describes, in Theory and Experiment in Gravitational Physics, [1] the emergence of a new era for general relativity, testing and checking at very high levels of accuracy. In 1959, scientists at Lincoln Laboratories in Massachusetts bombarded the … Read More

Evaluation of post-Einsteinian gravitational theories through parameterized post-Newtonian formalism

|

Proliferation of post-Einsteinian gravitational theories Right after the elaboration and success of general relativity (GR), alternative theories for gravity began to appear, which can fall into four broad categories: [1] Bifurcated theories (with the Lakatosian[2] hard core identical or very … Read More

Heuristics of the General Relativity

|

The essential principle of coordination in GR is the principle of equivalence, including a negative heuristic. The argument “is not that all reference frames are equivalent, but that the classical coordination of uniform motion in a straight line with the … Read More

Epistemology of General Relativity

|

Early philosophical interpretations of the general theory of relativity are very diverse, each trying to identify Einstein as a follower of that philosophy. Mach’s supporters highlighted Einstein’s attempt to implement a “relativization of inertia” in general relativity (GR), and his … Read More

Tests and Anomalies of Post-Newtonian Gravitational Theories

|

Tests of post-Newtonian theories Newton’s proposed tests In the first edition of Principia, Newton considered that the experiments with the pendulum would allow him to decipher the different types of resistance force and their variation with speed. It recognizes the … Read More

Proliferation of Post-Newtonian, Non-Relativistic Theories

|

Theoreticians have formulated a set of fundamental criteria that any theory of gravity should satisfy, two purely theoretical and two that are based on experimental evidence[1]. Thus, a theory must be: complete (capable of analyzing from the “first principles” the … Read More

Henri Poincaré, Reports on Matter and Ether

|

(Conference at the French Society of Physics, April 11, 1912.) When Mr. Abraham came to ask me to close the series of lectures organized by the French Society of Physics, I was at first about to refuse; it seemed to … Read More

Heuristics of Newtonian Gravity

|

The classic example of a successful research program is Newton’s gravitational theory, probably the most successful Lakatosian research program. Initially, Newton’s gravitational theory faced a lot of “anomalies” (“counterexamples”) and contradicted the observational theories that supported these anomalies. But supporters … Read More

Henri Poincaré, Quanta hypothesis: Conclusions

|

We see what is the state of the question; the ancient theories, which hitherto seemed to account for all known phenomena, have encountered an unexpected obstacle. It seemed that a modification was necessary. A hypothesis was first presented in Mr. … Read More

Henri Poincaré, Quanta hypothesis: The ideas of Mr. Sommerfeld

|

Mr. Sommerfeld has proposed a theory which he wants to relate to that of Mr. Planck, although the only connection between them is that the letter h appears in both formulas, and that the same name of quantum of action … Read More

Epistemology of Newtonian Gravity

|

In certain research programs, such as the mechanistic theory of the universe according to which the universe is a huge clock (and a system of vortices) with the push as the sole cause of movement, the particular Cartesian metaphysics functioned … Read More

1 2 3 4 7