What is optics definition?

Optics is a branch of physics that deals with the behavior and properties of light, including its interactions with matter and the instruments used to detect it. It involves the study of various phenomena, such as reflection, refraction, diffraction, and interference, as well as the principles of geometric and wave optics. Optics plays an important role in many fields, including astronomy, medicine, telecommunications, and engineering. Applications of optics range from simple lenses and mirrors to complex systems such as telescopes, microscopes, and lasers.