Comment on They are watching

• Agent641@lemmy.world ⁨1⁩ ⁨year⁩ ago

  Cherenkov radiation. Look it up on youtube for a video of a experimental reactor making some.

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• Illegal_Prime@dmv.social ⁨1⁩ ⁨year⁩ ago

  Mercury arc valve, an old method of converting AC electricity to DC.

  source