Optics is the branch of physics that deals with the behavior and properties of light and its interactions with matter. It includes the study of phenomena such as reflection, refraction, diffraction, interference, and dispersion of light, as well as the design and construction of instruments and systems for producing, controlling, and measuring light.
Optics is a broad and interdisciplinary field, with applications in a wide range of fields, including astronomy, medicine, communications, and manufacturing. Some examples of specific areas of study within optics include geometrical optics, which deals with the behavior of light rays as they travel through lenses and other optical elements; physical optics, which studies the wave-like nature of light and its interaction with matter; and quantum optics, which deals with the behavior of light on the atomic and subatomic level.
Optics is a fundamental field of study that has had a profound impact on many aspects of modern life, and continues to be an active area of research and development.