For the question of speed of light comparison the difference between two velocities and time points such as in average acceleration can be faster than the constant c.
http://www.science20.com/scien...
This article may show why. However the problem of velocity may be looked at in different ways such as invoking independent time (correction).
The relativistic time parameter of correction, different from 2L/v, can be time dependent and more near the the circumference question close to the describing the earth tc ~ (2pir)/v.
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For the question of speed of light comparison the difference between two velocities and time points such as in average acceleration can be faster than the constant c. http://www.science20.com/scien... This article may show why. However the problem of velocity may be looked at in different ways such as invoking independent time (correction). The relativistic time parameter of correction, different from 2L/v, can be time dependent and more near the the circumference question close to the describing the earth tc ~ (2pir)/v.