The coloured discharge tubes for advertisement mainly contain (a) xenon (b) helium (c) neon (d) argon
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(c) Neon because it gives bright orange colour when electricity is passed through it
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The coloured discharge tubes for advertisement mainly contain Neon.
Explanation:
- The Neon is used in the coloured discharge tube as the presence of neon produces the bright orangish colour to the light used to glow to make the advertisement bright.
- This helps to stabilise the colour and intensity of the light irrespective of the low or high voltage of the electricity which is used to pass to glow the light of the advertisement.
- The Neon is also used in the manufacturing of the laser lights.
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