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Physics, Astronomy & Cosmology / Re: Gas discharge tube hydrogen
« on: 17/03/2024 11:27:24 »
This " An electron could be free of the nucleus only if it absorbs a photon raising its energy beyond the transition limit. " is missing the point of a gas discharge lamp.
The voltage gradient is big enough to pull the electrons out of the atom.
In some cases they have a hot filament which emits electrons and those can be accelerated by the field and when they hit an atom (or molecule) they ionise it and start a Townsend Avalanche.
The voltage gradient is big enough to pull the electrons out of the atom.
In some cases they have a hot filament which emits electrons and those can be accelerated by the field and when they hit an atom (or molecule) they ionise it and start a Townsend Avalanche.