A noble gas laser is a type of laser that uses noble gases, such as helium, neon, or argon, as the medium for producing light. These gases are chemically inert, meaning they do not react with other substances, which allows for stable operation. The laser works by exciting the gas atoms with an electrical current, causing them to emit light as they return to their normal state. Noble gas lasers are commonly used in various applications, including laser pointers, barcode scanners, and medical devices. They produce a range of wavelengths, often in the visible spectrum, making them useful for both scientific and commercial purposes.