In the phenomenon of electric discharge through
gases at low pressure, the coloured glow in the
tube appears as a result of:
(a) excitation of electrons in the atoms
(b) collision between the atoms of the gas
(c) collisions between the charged particles
emitted from the cathode and the atoms of the gas
(d) collision between different electrons of the atoms of the gas
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Answer:
a.
Explanation:
excitation of electrons in the atoms
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