This book uses a diverse suite of methods for the description of photosynthesis, ranging from the subjectivity of human perception of sun and light to the mathematical rigour of quantum electrodynamics in the economy of primary production. This interdisciplinary work thus draws from fields as diverse as cosmology and astrophysics, classical and quantum optics, biology, agriculture, economy, and finance mathematics around the working principles of photosynthesis in plants and cyanobacteria. Phenomena from daily life to explain and quantum electrodynamics. Based on numerous practical applications. Ideal for students who believe they would not understand quantum theory. Book jacket.