Physicists, however, do not consider fields to have mediums. But a negative result in science without a positive result usually means that the experimental design was inadequate. Obviously, electromagnetic waves must be a result of a variation in a medium, though in some cases, there are particles moving with the waves. The velocity is then determined relative to the medium. Since the energy equation is incorrect, relativity must be incorrect, because it depends upon the energy equation.
Relativity indicates that as velocity increases, mass, time and distance change.
It is not valid to alter such basic properties, because they must be used as yardsticks to measure with. Volts and Watts. With corrected definitions, voltage is a field, not a force. Watts correlate with units of force. Just as a mass must enter a field of gravity to create a force, electrons must enter a field of voltage to create a force.