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We would welcome comment and further discussion on the following
apparent corollary in special relativity (SR). Through one-time
application of the Lorentz transformation one can derive a general
expression for the transit time of a photon between two inertial
frames, T2-T1 = Lo*sqrt[(1+v/c)/(1-v/c)]. Here, Lo is the separation
of the inertial frames at the time T1 when the photon is sent from
one frame and T2 is the time when it arrives at the other frame. Each
time is directly recorded by the observer on his own clock, situated
in the corresponding frame. This equation is appropriate for
calculations in various kinematic applications of SR. With it, one
can determine time and space event coordinates in any communications
with photons between frames. The equation of motion of light, as it
were, permits rendition of activity, observed in one inertial frame
by a physicist there, to another observers frame, thereby
accomplishing the essential purpose of SR, namely reconciliatio n of
physics everywhere. In application, no transformations as such of
event coordinates are involved and there is no need for use of the
velocity addition theorem. Everything is reduced to the simple
question of correction to light transit time for signal delay, in
form, a classical operation.