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

We see that the electric force is very large indeed between the negative glow and the cathode, much larger than in any other part of the tube.

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

Let us now consider what will happen to these corpuscles shot out from the negative glow with a velocity depending on the cathode fall of potential and independent of the pressure.

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

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

The electric force exerted by this cloud of corpuscles will diminish the strength of the electric field in the region between the cathode and the negative glow, and thus tend to stop the discharge.

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

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

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