Lasers, which stands for Light Amplification by Stimulated Emission of Radiation, is a technology that uses the properties of light to produce a coherent and focused beam of light. Lasers have a wide range of applications in various fields, including medicine, communications, manufacturing, and research. They are used for cutting, welding, and marking materials, as well as in medical procedures like surgery and cosmetic treatments. The study of lasers involves understanding their properties, types, and applications, as well as developing new technologies to improve their performance and capabilities.