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

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

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

Let us call this force ap; then if l is the distance of the anode from the negative glow the potential difference between these points will be alp.

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

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

In rarefied air the negative glow can easily be obtained.

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