1Note: An example of the divergence of particle characteristics at high speeds is
given by W. Bertozzi  in which the addition of energy to high speed electrons in a linear accelerator did not result in a proportionate increase in electron velocity. Consistent with this example and consistent with the postulates of the Special Theory of Relativity, if an electron is accelerated by an earth-stationed experiment to a speed approaching that of light in
vacuo, a second experimenter traveling in the same direction and at the same speed as the high speed electron, would observe the particle to be at rest. Consequently, in order for this second experimenter to accelerate the particle to a speed approaching that of light relative to his reference frame, he must impart the identical amount of energy to the particle that was previously imparted by the earth-stationed experimenter. The second experimenter will thus determine that the addition of energy to the rest particle results in a concomitant increase in velocity of the particle until the particle again approaches the speed of light in
vacuo. According to field medium theory, however, the disproportionate energy to acceleration relation near the speed of light in vacuo results from the transmission of the particle through the matter or gravitational field medium at a speed approaching that of light in such medium. Thus, according to such theory, the second experimenter would immediately find that the addition of energy to the rest particle did not result in an equivalent increase in particle velocity.