Optical systems are arrangements of lenses, mirrors, and other components that manipulate light to form images or transmit information. They are commonly used in devices like cameras, microscopes, and telescopes. The primary goal of these systems is to focus light accurately, allowing us to see objects clearly or magnify them for detailed observation. These systems rely on the principles of geometric optics, which describe how light travels and interacts with different materials. By understanding concepts such as refraction and reflection, engineers can design optical systems that enhance vision and improve various technologies, including fiber optics for communication.