This strong interaction is observable in two areas: on a bigger scale (about 1 in order to 3 femtometers (fm)), it does not take force that binds protons along with neutrons (nucleons) together in order to create the nucleus of atom. On small scale (less compared to about 0. 8 fm, the radius of any nucleon), it will be the force (carried simply by gluons) that keeps quarks together in order to create protons, neutrons, and also other hadron particles.
Strong Interaction
