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Can melt or vaporize "virtually anything?" What is that supposed to mean? Sounds like a magic weapon! Maybe be specific on hardnesses of things it can't melt? I don't know enough about it, but that made me laugh.
- This is a little late I guess, but what it means is that an arc's temperature is typically anywhere from 10,000 to 30,000 degrees F, or greater. In other words, a temperature ranging from a yellow star to a blue giant. That is well beyond the vaporization point of any material, including carbon (even in the form of diamond). Zaereth (talk) 00:20, 9 February 2018 (UTC)
It is generally dangerous to look at an electric arc (except perhaps from a great distance), because it generally makes UV radiation that can be blinding, as I have been told. You might want to add that here on the arc page - and even flag it in your front page article on welding.Pdn 02:25, 31 May 2005 (UTC)
We have tons of articles about arcs and sparks but I am still not clear on the differences between each. See Talk:Spark gap#Clarify the difference for some questions I have about the different kinds of discharge. - Omegatron 14:20, August 2, 2005 (UTC)
Does the magnetic field of the arc "attract" itself and change its shape? I know the shape changes due to heating of the air and convection. It seems like maybe the magnetic field would twist the arc? Just a hunch. - Omegatron 13:40, August 5, 2005 (UTC)
There seems to be an incorrect use of the word "etch" in the "Plasma Path" section. Also, the entire section seems anecdotal and non-essential. -- Brian Williams
I deleted plasma path section --Vladimír Fuka 19:55, 1 September 2006 (UTC)
A glow discharge is not an arc. Discuss current vs. voltage characteristics of arcs; higher current arcs need less voltage to sustain them, so there is an incremental negative resistance (source of many interesting properties). Discuss the regieme of currents - arcs only appear at fractions of an amp and upwards; microamp and nanoamp discharges aren't arcs. I'll have to read A. H. Howatson, An Introduction to Gas Discharges, Pergamon Press, Oxford, 1965 again this weekend. --Wtshymanski 20:37, 18 September 2007 (UTC)
Removed paragraph for copyvio
Removed a paragraph from the Undesired arcing section. Copied from this source provided as a citation, which doesn't make it okay. I don't have a grasp of the material adequate to attempt a rewrite. Richigi (talk) 00:32, 30 March 2013 (UTC)
Lightning not an arc
Lightning IS NOT an arc discharge as your photograph states, it is an electrostatic discharge, a spark. Here is your own article. https://en.wikipedia.org/wiki/Lightning
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Fluorescent lamp is not an arc lamp
- It depends on the type of fluorescent lamp. Most fluorescent lamps emit electrons from the cathode due to thermionic emission. This is why rapid-start lamps actually preheat the cathode. By definition, the thermionic emission of electrons is an arc. However, it is a low-pressure arc, so that it emits more spectral lines than continuum radiation and is fat enough to fill the tube.
- Cold-cathode fluorescent lamps operate using a glow discharge, basically operating like a neon light. These don't require a ballast, because they operate at a much higher voltage and pressure, and the reactance of the transformer is enough to limit the current. These are most often used for back-lighting for flat-screen TVs and similar applications. I hope that helps. For more info see Fluorescent lamp. Zaereth (talk) 17:53, 8 February 2018 (UTC)