Quantum theory provides the basis for our current understanding of how the universe works. Specifically, it predicts that energy comes in tiny packets known as quanta. A quantum of light is called a photon and photonics is the study of the interactions between light and matter. In this third-year course you will learn about these topics and their applications. You will study photonics and other advanced topics in quantum theory, including modern instrumentation, the electronic structure of matter, and the interpretations of quantum mechanics. This course is essential for those wishing to undertake further study in physics, beyond the undergraduate level.