this post was submitted on 14 Jan 2025
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submitted 1 day ago by MataVatnik@lemmy.world to c/science_memes@mander.xyz
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[–] MataVatnik@lemmy.world 4 points 14 hours ago (1 children)

In typical conditions, an electrical arc forms when the electric field strength exceeds the dielectric strength of the medium (like air). In a vacuum, there is no medium to ionize, which theoretically makes it difficult for an arc to form. However, electricity can still arc in a vacuum under certain conditions, such as when high voltages are involved or when the electrodes are extremely close together.

https://peacepower.ca/faqs/can-electricity-arc-in-a-vacuum#%3A%7E%3Atext=In+typical+conditions%2C+an+electrical%2Celectrodes+are+extremely+close+together.

[–] big_fat_fluffy@leminal.space 4 points 14 hours ago (1 children)

I was thinking neon lights. I mean that's basically an arc, just spread out. I think I heard that there's a glow in vacuum too, just not as nice as with neon.

[–] Trigger2_2000@sh.itjust.works 1 points 7 hours ago

Well, a quick search turned up this: Vacuum Arc

However, like the above comment, it seems to refer to freeing electrons from the conducts, so, IMHO, you no longer have a vacuum.

If you could somehow maintain a perfect vacuum; I wonder how this concept Virtual particle would come into play (or if it would at all).