A laser beam is a focused stream of light that is created by a device called a laser. The term "laser" stands for "Light Amplification by Stimulated Emission of Radiation." Unlike regular light, which spreads out in many directions, a laser beam is highly concentrated and travels in a straight line. This makes it useful for various applications, including cutting, measuring, and medical procedures. Lasers can produce different colors of light, depending on the materials used in the laser and the energy levels involved. They are commonly found in everyday items like barcode scanners, CD players, and laser printers. Their precision and intensity make them valuable tools in science, industry, and entertainment.