Neon light is bright and colourful which are used to display sign boards at railway station, airports, markets etc. Neon signs are the partially ionized plasma.
Each atom of neon gas has completely filled valence shell, thus needs lots of energy to separate electrons from atom.The gas is subjected to a high voltage and low pressure and the electrons are either separated from the atoms of gas or pushed into higher energy level. The gas inside the bulb becomes a conductive plasma. The excited electrons than drop back into their previous energy levels and emit photons(light).
Light that is produced by neon gas is reddish-orange in colour. Similarly argon produces blue colour, krypton is green and helium is pink. Different colours are obtained by mixing these gases.
The colour depends upon the excited level of energy where electrons have jumped into and than return to its original state of energy emitting light of different colours.
Each atom of neon gas has completely filled valence shell, thus needs lots of energy to separate electrons from atom.The gas is subjected to a high voltage and low pressure and the electrons are either separated from the atoms of gas or pushed into higher energy level. The gas inside the bulb becomes a conductive plasma. The excited electrons than drop back into their previous energy levels and emit photons(light).
Light that is produced by neon gas is reddish-orange in colour. Similarly argon produces blue colour, krypton is green and helium is pink. Different colours are obtained by mixing these gases.
The colour depends upon the excited level of energy where electrons have jumped into and than return to its original state of energy emitting light of different colours.
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