👉 In optics, an "optical" refers to a phenomenon that involves the interaction of light with matter. Optical phenomena are characterized by their ability to scatter or refract light in all directions, and they can be explained using wave theory. Optics is a fundamental branch of physics that deals with the behavior of light at different wavelengths. It encompasses many areas such as optics, quantum mechanics, and electromagnetic radiation. Optical phenomena have applications in various fields such as astronomy, telecommunications, medicine, and engineering.