Question

Draw a neat diagram of a Helium Neon gas laser tube.

Answer 1

In optical physics, we come across two types of devices; one which produces their own light, called as luminescent objects and the other which do not emit their own light, but reflect light radiation emitted on them and are called non-luminescent objects. A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation".

Complete step by step answer:

Additional information: A helium–neon laser or He-Ne laser, is a type of gas laser whose gain medium consists of a mixture of 90% helium and 10% neon at a total pressure of about 1 torr inside of a small electrical discharge. The best-known and most widely used He-Ne laser operates at a wavelength of 632.8 nm, in the red part of the visible spectrum.

Note: Some famous lasers are Ruby lasers, He-Ne lasers and semiconductor lasers.
The He-Ne laser has a very good coherence property and it is more directional than solid state laser. It continuously supplies the laser beam without having large cooling arrangements cost of HC any laser is less than that of most of the laser’s construction is also very compact analyser provides inherent safety low power output