A laser beam is a highly concentrated beam of light that is created by the amplification of light through stimulated emission of radiation. Laser beams are used in a wide variety of applications, including telecommunications, laser cutting, laser marking, laser engraving, laser surgery, and laser displays.
Laser beams are important because they can be used to transmit large amounts of data over long distances, cut and engrave materials with high precision, perform surgery with minimal scarring, and create stunning visual displays. The development of the laser in the early 1960s was a major breakthrough in the field of optics and has led to numerous advances in science and technology.