ABSTRACT
This chapter discusses the polarization of the photon is applicable to many other problems. It considers neutral K mesons. Notice that charge is conserved in the reaction; the left side has total charge zero, and so does the right side. Similarly, there exists another "quantum number," called strangeness, that one’s' can assign to the particles that participate in-strong interactions, and it is an experimental fact that strangeness is conserved in strong interactions. The chapter explains a charge conjugation operation for neutral K mesons that changes particles into antiparticles and vice versa. The neutral K mesons decay by weak interactions. As strangeness is conserved in strong interactions, charge conjugation parity is conserved in weak interactions. A very similar situation occurs with neutral K mesons. Some rather striking quantum mechanical effects can occur with K mesons.
