Faraday dark space

American  

noun

Physics.

1. the dark region between the negative glow and the positive column in a vacuum tube occurring when the pressure is low.

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Etymology

Origin of Faraday dark space

First recorded in 1890–95; named after M. Faraday

Example Sentences

The force reaches a minimum either in the negative glow itself or in the part of the Faraday dark space just outside, after which it increases towards the positive column.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" by Various

The dimensions of the Faraday dark space and the positive column vary greatly with the current passing through the gas and with its pressure; sometimes one or other of them is absent.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" by Various