Due to excitation of electrons in atoms.
In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of
Held on 30 Apr 2008 · Verified 9 Jul 2026.
Collision between different electrons of the atoms of the gas
Excitation of electrons in the atoms
Collision between the atoms of the gas
Collisions between the charged particles emitted from the cathode and the atoms of the gas
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De-Broglie wavelength of an electron orbiting in the $n=2$ state of hydrogen atom is close to (Given Bohr radius $=0.052 \mathrm{~nm}$ )
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