For the scientists, the Unified Field represents the union of
the weak nuclear force and the powerful nuclear force with the
electromagnetic force and the force of Gravity.
In the Great Union case, there is supposed the possibility of
the union of the weak nuclear force (representing the
electronic cover of the atom) with the powerful nuclear force
(representing the atomic nucleus composed by protons and
neutrons) with the electromagnetic force. The nuclear force
and the electromagnetic force are milions and milions times
biger than the Gravity force, negligible in this case.