negative glow

American  

noun

Physics.

1. the luminous region between the Crookes dark space and the Faraday dark space in a vacuum tube, occurring when the pressure is low.

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Etymology

Origin of negative glow

First recorded in 1885–90

Example Sentences

More careful observation and experiment have convinced me, that when the negative glow occurs, it never visibly touches the luminous part of the positive discharge, but that the dark space is always there.

From Experimental Researches in Electricity, Volume 1 by Faraday, Michael

We may regard the part of the discharge between the cathode and the negative glow as a discharge taking place under minimum potential difference through a distance equal to the critical spark length.

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

I will now notice a very remarkable circumstance in the luminous discharge accompanied by negative glow, which may, perhaps, be correctly traced hereafter into discharges of much higher intensity.

From Experimental Researches in Electricity, Volume 1 by Faraday, Michael

To obtain a negative glow in air at common pressures is difficult.

From Experimental Researches in Electricity, Volume 1 by Faraday, Michael

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