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why thin region adjaciant to electrodes glow in the lamp? what is the principal of neon bulb? how neon act as a logic element in ring counter? why in d.c. source only negatively electrode glow?

why thin region adjaciant to electrodes glow in the lamp?


what is the principal of neon bulb?


how neon act as a logic element in ring counter?


why in d.c. source only negatively electrode glow?

Grade:12th Pass

1 Answers

Aman Bansal
592 Points
7 years ago

The working of neon lamps is quite simple. Neon lamps consist of glass tubes which are closed or wrapped and contain neon gas. Neon is basically an inert gas which lies on the right end of the periodic table and is also present in the air around us.
The neon tube contains a negative terminal at one end and a positive terminal at the other. In state of rest i.e. when the tube is not on, the ordinary atoms of neon gas are present in it.
If we wish to pull apart the neon atoms then the terminals need to be equipped to reach a stage of high voltage power supply which is around 15000 volts because a huge amount of energy is required in order to produce a movement in the neon atoms and to pull them away from each other. In this process, few atoms also tend to lose electrons as a result of which they become positively charged. Hence, due to their positive charge, they will be attracted towards the negative terminal. As the electrons are negatively charged particles so when a loss of electrons occurs during this process the electrons try to race their way towards the positive terminal of the tube.
Throughout this process, various collisions occur between atoms, electrons and ions. These crashes or hits generate a huge amount of energy which activates the atoms as well as ions which results in emission of red light photons. This release of energy also results in emission of heat and a buzzing of red light. The neon light is extremely hot because of the emission of infrared radiations and red light from the atoms.

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