This course is designed to lay the groundwork for modern research in specific fields of atomic and optical physics. The curriculum delves into the dynamics of how radiation interacts with atoms, encompassing concepts such as resonance, various forms of emission (absorption, stimulated, and spontaneous), and resonance techniques. It also explores advanced topics like the dressed atom approach, the principles and mechanics of masers and lasers, and the intricacies of cavity quantum electrodynamics. A significant focus is also placed on contemporary experimental methods in this domain.