Electric arc

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A topic known well beyond its field, found in many languages.

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Notion

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Science and technology

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What Wikipedia says

An electric arc (or arc discharge) is an electrical breakdown of a gas that produces a prolonged electrical discharge. The current through a normally nonconductive medium such as air produces a plasma, which may produce visible light. An arc discharge is initiated either by thermionic emission or by field emission.

Excerpt from the Wikipedia article “Electric arc”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Achim Grochowski -- Achgro, CC BY 3.0, via Wikimedia Commons.