dark space

noun

Definition of dark space

: any of several regions or layers in the visible-glow discharge of a gas-filled cold-cathode electron tube that remain nonluminous or exhibit low light intensity until the ions in such spaces acquire sufficient energy to excite fluorescence in the tube gas — see aston dark space , crookes dark space , faraday dark space

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Cite this Entry

“Dark space.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20space. Accessed 26 Nov. 2020.

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