Understanding the Quantum World

1 15 Quantum Properties of Light Among Einsteins insights was that light comes in discrete packets of energy called photons. Explore the photoelectric effect, which prompted Einsteins discovery. See a do-it-yourself project that demonstrates the photoelectric effect. Close by surveying applications of the quantum theory of light to phenomena such as lasers, fluorescent dyes, photosynthesis, and vitamin D production in skin.