Galilean  Newton Relativity vs. Special and General Relativity Physics
"The truth of a theory can never be proven, for one never knows if future experience will contradict its conclusions"  Albert Einstein ( 1879  1955 )
Essential Galilean ( Newton ) Relativity Physics Postulates:
Derived Consequence of Galilean ( Newton ) Relativity Physics:
note: the above outline framework is somewhat arbitrary as, in truth, the entire package of statements constitutes the Galilean  Newtonian Relativity assumptions.
The Einstein Relativity Physics Postulates:
A). The Principle of Relativity  All the laws of physics in their simplest reduced form are transformable and hence invariant as between an infinite number of moving reference
systems ( inertial systems ), each one of which is moving uniformly and rectilinearly with respect to any other system and where no one system
is privileged or preferred over any other reference ( inertial ) system when measurements of length or time are taken.
B). The Principle of the Constancy of the Speed of Light  The speed of light in empty ( vacuo ) space is a universal constant as measured in any reference ( inertial ) system when
measured with rods and clocks of the same kind. This is always true notwithstanding any "relativistic effects" of either the
Lorentz length contraction or time dilation as demonstrated by the Michelson  Morley Experiment ( 1887 ).
C). The Principle of Equivalency in General Relativity^{∗}  The effects of acceleration upon a body's inertial mass is equivalent to its gravitational mass in an accelerated frame of reference, but this
equivalence can be eliminated by choosing an alternative inertial, non  accelerated, frame of reference where acceleration does not exist.
Corollaries to The Einstein Relativity Physics Postulates:
Further Derived Consequences of Special and General Relativity Physics:
^{∗} See: General Relativity: Reinterpreting Galileo  Newton's Relativity Principle
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