Mesons Are Particles That Mediate the Strong Nuclear Force $\backsim$ 15 Fm Between Two Nucleons in the Nucleus

Multiple Choice

Mesons are particles that mediate the strong nuclear force. They are thought to travel at near the speed of light and exist over a distance of $\backsim$ 1.5 fm between two nucleons in the nucleus. The mass of the mesons is of the order

A) 10 MeV/c².
B) 150 MeV/c².
C) 550 MeV/c².
D) 1000 MeV/c².
E) 3000 MeV/c².