A laser, which stands for Light Amplification by Stimulated Emission of Radiation, is a device that emits a focused beam of light through a process of optical amplification. Lasers are known for their ability to produce light that is coherent, monochromatic, and highly directional, making them useful in various applications such as cutting, welding, and medical procedures. Lasers have revolutionized many fields, including medicine, where they are used for surgeries and skin treatments, and telecommunications, where they enable high-speed data transmission. Their precision and efficiency continue to drive innovation in technology and science.