2010-09-14 17:03:10 UTC
Definition for a proper second: it is a second at the rest frame of a
The answer to this question is yes.
Because a clock second in the rest frame of the clock does represent a
specific interval of absolute time. However, it is important to
realize that a clock second does not represent the same interval of
absolute time in different frames....this is the reason why clocks in
different frames run at different rates. This means that one can't
compare clock second accumulated during the journey of a clock to a
clock second accumulated on the stay at home clock. This means that
the twin paradox never happen in terms of absolute time.
The math of SR/GR is design to determine the clock time value on an
observed clock for an interval of proper time (absolute time) on the
observer's clock. The GPS supports this interpretation. The GPS
second is redefined to have 4.46 more periods of Cs 133 radiation.
This redefinition of the GPS second is designed to make the GPS second
contains the same amount of absolute time as a ground clock second and
thus making the GPS in synch with the ground clock permanently.
A new theory of relativity called IRT uses this interpretation. IRT
includes SRT as a subset. However, unlike SRT, the equations of IRT
are valid in all environments, including gravity. A paper on IRT is
available in the following link: