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Re: General Theory of Relativity



This is not contrary at all. Galilean transformation just gives the
usual law for adding velocities.
v'=v-u where u is the velocity of the primed observer as seen by the
unprimed observer -- just the everyday way we mentally transform to a
moving frame. Obviously c (or any velocity) is not invariant to this
transformation. However since u is a constant (for inertial frames),
du/dt = 0, and a'=a. Thus acceleration of moving object is same as seen
by both observers.

All expected speed of light to be different for observers moving with
respect to each other, as per above transformation law. Whenit was not
so, it led eventually to acceptance of Special Relativistic
transformation law v'=(v-u)(1-uv/c^2)^-1. THis leaves c invariant.

This is not controversial in the slightest.
J. Epstein