ABSTRACT
In this chapter, the author presents evidence to show that the behavior of particles at very high speed simply does not conform to Newtonian dynamics. By analyzing this behavior, and by following Einstein in the assumption that the center of mass of an isolated system does not spontaneously shift. Newton’s mechanics concerns itself with the motions of particles under the action of forces. A particle is regarded as a material point; its motion is described by the position of that point in space as a function of time. It is assumed that the separate concepts of space and time are well understood, even though they defy adequate definition. But if the acceleration is through millions of volts, instead of hundreds, the need for a revised dynamics becomes glaringly obvious. This has been demonstrated in a filmed experiment that explores the relation between speed and kinetic energy for electrons of kinetic energies up to 15 MeV.
