Based upon the brief descriptions provided in table 1.2, which subfield of physics would you say is involved in the explanation of rainbows? Which subfield is involved in describing how an acorn falls? Explain.

table 1.2 The Major Subfields of Physics Mechanics. The study of forces and motion. Thermodynamics. The study of temperature, heat, and energy. Electricity and Magnetism. The study of electric and magnetic forces and electric current. Optics. The study of light. Atomic Physics. The study of the structure and behavior of atoms. Nuclear Physics. The study of the nucleus of the atom. Particle Physics. The study of subatomic particles (quarks, etc.). Condensed-Matter Physics. The study of the properties of matter in the solid and liquid states.