helium neon gas laser

Helium - Neon Gas Laser - The figure shows the elements of a type of laser that is often found in student laboratories. The glass discharge tube is filled with a 80%-20% mixture of the inert gases helium and neon. Helium..

The glass discharge tube is filled with a 80%-20% mixture of the inert gases helium and neon..

.H. Townes and his co-workers. They discovered MASER. The principle of maser was adopted for the radiations of visible region by A. Schawloo in collaboration with Townes in the year 1958. The first laser device was developed by T .H. Maiman in the year 1960. It was "Fabry Parot Optical ca..

It is commercially obtained from natural gas, which contains H 2 S, CO 2 , H 2 O, N 2 , hydrocarbons and helium. Natural gas is compressed and cooled when nitrogen, hydrocarbon etc. get liquefied while helium remains unliquified, as a gas, which is..

It is material in which the laser action is made to take place. It may be solid, liquid or gas. Many lasers are named after the material used e.g. ruby laser, He-Ne laser, CO 2 laser, Nd: YAG laser etc. The most important chara..

Tungsten light, spread over a continuous spectrum, gives us no basis for comparison. The light from selected lines in a gas discharge tube, however, can have wavelengths in the visible region that are precise to about 1 part in 10 6 . The sharpness of definition of laser light ..

Argon is used mainly to provide an inert atmosphere in high temperature metallurgical processes (arc welding of metals or alloys) and for filling electric bulbs. It is also used in the laboratory for handling substances that are air-sensitive. Helium is a non-flammable and light gash..

1. First period The first period has two elements - hydrogen and helium. 2. Second and third period The second and third periods are known as short periods. Each consists of eight elements. The second period starts with lithium (Z = 3) and ends with inert gas..

Hydrogen being the lightest gas, was earlier used in meteorological balloons and dirigibles (a balloon airship used during world war I). But since it is highly combustible, it was replaced by helium gas even though helium is nearly four times denser than hyd..