２３ Quantum chromodynamics【What is the Universe？】Dialogue with the Universe
・Since neutron without electric charge has the strong magnetic moment, physicists was forced to assume that hadron (proton, neutron) is constituted with smaller element.
・Now, hadron is considered as what consists of six kinds of quarks, and eight kinds of gluons which mediate strong interaction inside hadron.
・There are 3 colorred quarks,red, blue and green, and a white hadron will be formed if the three joins together.
・The word "color" is what imagined the three primary colors of light and was used figuratively.