Optical applications refer to the use of light and its properties in various technologies and devices. Common examples include lenses in glasses that help correct vision, cameras that capture images, and fiber optics used in telecommunications to transmit data over long distances using light signals. In addition to everyday items, optical applications are crucial in scientific fields. Microscopes allow scientists to observe tiny structures, while lasers are used in surgeries and manufacturing. These applications demonstrate how understanding light can lead to advancements in both practical and research-oriented technologies.