Quantum optics is a branch of physics that studies the behavior of light and its interaction with matter at the quantum level. It explores phenomena such as the particle-wave duality of light, where photons can exhibit both wave-like and particle-like properties. This field helps us understand how light behaves in various situations, including its role in technologies like lasers and quantum communication. Researchers in quantum optics often investigate concepts like quantum entanglement and superposition, which are fundamental to quantum mechanics. These principles have significant implications for developing advanced technologies, including quantum computing and quantum cryptography, which promise to revolutionize information processing and security.