The Helium-Neon laser is a type of gas laser that produces a coherent beam of light, primarily in the red spectrum at a wavelength of 632.8 nanometers. It operates by exciting a mixture of helium and neon gases, which allows the atoms to emit light when they return to a lower energy state. This laser is known for its stability and low cost, making it popular for various applications. Common uses of the Helium-Neon laser include barcode scanners, laser pointers, and optical devices in laboratories. Its ability to produce a continuous wave of light makes it suitable for precise measurements and alignment tasks. The laser is also used in holography and medical applications due to its relatively low power output.