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438

physics ≠ magic (lemmy.ca)

submitted 4 months ago by [email protected] to c/[email protected]

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[–] [email protected] 27 points 4 months ago (3 children)

Is the last pic the criticality blue glow from reactors?

[–] [email protected] 55 points 4 months ago* (last edited 4 months ago) (1 children)

Ah, it’s a photo of a mercury arc rectifier (which is more electrical engineering, maybe?), not, Cherenkov radiation.

[–] [email protected] 24 points 4 months ago

"Mercury" and "arc" on the same sentence do really, really not make one imagine something that perfectly fine to use or be around in operation.

[–] [email protected] 3 points 4 months ago

Nah it’s a glass something that has to do with electricity but I forgot what

[–] [email protected] 3 points 4 months ago

Just plain old blue electrical arcs.

On the other hand, Cherenkov radiatiation is only indirectly related to criticality. It comes from any particle moving through a medium, generally water, faster than light travels through that medium. A luminous sonic boom of sorts! It's associated with criticality because those are the contexts where it happens often enough to actually be visible.