Question

what are the various uses to which the discharge tube phenomenon is applied

Answer 1

Gas discharge tubes operate by ionizing the gas filled inside tubes with an applied voltage to cause electrical conductance.The phenomena of gas filled discharge tube is used in fluorescent lamps, metal-halide lamps, sodium vapour lamps, and neon lamps.
Various gases like Hydrogen, Deuterium, and noble gases are used to fill the gas discharge tubes.

Answer 2

Some of the uses of Discharge Tube phenomenon are as follows:

1. Research purposes: Discharge tubes are used in Chemistry and Physics research, for finding new sub-atomic particles. Electrons and protons were discovered using this method.

2. Television display: TV screens (CRT screens) have discharge tubes built in them in groups of three, each of which are in different colours and combine in such a way to produce all colours visible to the human eye. 

3. High-intensity lamps: Sodium lamps combined with mercury discharge lamps provide high levels of brightness which produce an orange glow suitable for street lamps.