Absolutely Small, Chapter 7: Photons, Electrons, and Baseballs

The basic wave/particle duality of matter is illustrated with concrete examples. For example, how an old style TV (the big ones with the picture tubes) is explained to understand how electrons can act as bullets. Electrons are then shown to act like waves in that they diffract from crystal surfaces. Diffraction is explained. Why quantum theory is necessary for electrons and photons, but not for baseballs, is shown in some detail.