Testing the number of space-time dimensions by the 5.9 years repeated Millikan's oil drop experiments

The basic motive of the five-dimensional Kaluza-Klein theory is the unification of gravity and electromagnetism. A feature of these theories was the relation between the electromagnetic coupling e , and gravitational coupling GN and the radius of the fifth dimension Rc. The radius of the fifth dimension Rc is thus fixed by the elementary electric charge. From the known value of the elementary charge, we find that Rc is of the order of the Planck length. Based on The five-dimensional Kaluza-Klein theory, we show that if the observed harmonic pattern of the laboratory-measured values of GN is due to some environmental or theoretical errors, these errors must also affect the elementary electric charge e. We calculate the values of fundamental electric charge e predicted by 3+1 and 4+1 dimensional space-time model respectively. We find that in the case of 4+1 the fundamental electric charge e values are oscillated with the 5.9 year LOD oscillation cycle, while in the case of 3+1 space-time dimensions the fundamental electric charge e is constant and perfect fitted to the straight line. Furthermore, we propose that the number of space-time dimensions can be reveal by the 5,9years repeated Millikan's oil drop experiments