Discharge tubes- various types of anode and cathode.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Discharge tubes- various types of anode and cathode. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Discharge tubes- various types of anode and cathode. Wellcome Collection. Source: Wellcome Collection.