AIPMT 2008 Physics and Chemistry Paper

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Question : 13 of 100

Marks: +1, -0

In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of -

collisions between the charged particles emitted from the cathode and the atoms of the gas
collision between different electrons of the atoms of the gas
excitation of electrons in the atoms
collision between the atoms of the gas

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