Which noble gas is used in gas lasers?
Argon
Krypton
Helium
Xenon
Argon gas is used as a lasing medium in gas lasers. When an electric current is passed through the gas, it becomes excited and emits photons of light. The emitted light is then amplified by reflecting it back and forth between two mirrors. The photons stimulate the emission of more photons of the same frequency and phase, resulting in a coherent beam of light. Argon gas lasers emit light in the blue and green parts of the spectrum and are commonly used in scientific research, medical applications, and industry.
Argon gas is particularly well-suited for use in gas lasers because it is a noble gas, which means it is inert and does not react with other materials. This makes it easy to use and maintain in a laser system. In addition, argon gas is relatively abundant and inexpensive, which makes it a cost-effective choice for many applications.
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