Helium tube — Spectrum = gas discharge tube: the noble gas: helium He. Used with 1,8kV, 18mA, 35kHz. ≈8" length Photo Credit: By Alchemist-hp (talk) (www.pse-mendelejew.de) - Own work, GFDL 1.2, https://commons.wikimedia.org/w/index.php?curid=9597822
Helium tube
Spectrum = gas discharge tube: the noble gas: helium He. Used with 1,8kV, 18mA, 35kHz. ≈8" length
A xenon-filled discharge tube glowing light blue — Spectrum = gas discharge tube: the noble gas: xenon Xe. Used with 1,8kV, 18mA, 35kHz. ≈8" length. Photo Credit: By Alchemist-hp (talk) (www.pse-mendelejew.de) - Own work, FAL, https://commons.wikimedia.org/w/index.php?curid=9598160
Neon gas-discharge lamps forming the symbol for neon — Photo Credit: By Pslawinski, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=381579
William Ramsay's Nobel Prize certificate — Photo Credit: By Sofia Gisberg (1854-1926) - Museums and Collections, University College London, Public Domain, https://commons.wikimedia.org/w/index.php?curid=29333066