Optical properties refer to how materials interact with light. This includes how they absorb, reflect, or transmit light. For example, a glass window allows light to pass through, while a mirror reflects it. These properties are essential in designing various optical devices, such as lenses and cameras, which rely on manipulating light to function effectively. Different materials have unique optical properties that determine their appearance and functionality. For instance, water appears clear because it transmits most visible light, while colored glass absorbs certain wavelengths, giving it a distinct color. Understanding these properties helps in creating better products in fields like photography and optical engineering.