Absolutely Small, Chapter 3: Some Things About Waves

Quantum theory involves many concepts and results that depend on waves. This chapter is a discussion of waves. It talks about ocean waves, sound waves, and light waves. It introduces basic properties of waves, such as wavelength. In particular, it introduces the ideas of the interference of waves, that is, how waves can be added in certain ways. Understanding of waves is used in subsequent chapters to understand quantum mechanical waves.