- a bluish-green electric arc that has passed through a mercury-vapor cathode.
Origin of mercury arc
First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for mercury arc
Another lamp differing widely in appearance from the preceding arcs may be described here because it is known as the mercury-arc.
For example, assume that phosphorescent zinc sulphide is excited by the light from a mercury-arc.
It is a device broadly similar to the mercury-arc lamp produced by Peter Cooper Hewitt.
The mercury-arc rectifier proper consists of a glass bulb containing vacuum and a small amount of mercury.
The circuit of a mercury-arc rectifier charging outfit is shown in Fig. 415.
- an electric discharge through ionized mercury vapour, producing a brilliant bluish-green light containing ultraviolet radiation
- (as modifier)a mercury-arc rectifier See also ignitron