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

Next this we have a luminous position called the “negative glow” or the “third cathode layer.”

From Project Gutenberg

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 Project Gutenberg

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 Project Gutenberg

The difference of potential between the cathode and the negative glow is called the “cathode potential fall” and is found to be constant for wide variations in the pressure of the gas and the current passing through.

From Project Gutenberg

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 Project Gutenberg