ElectronicsQuestions on Nostr: Terahertz doesn't go very far: Also, what does that have to do with the chemical key ...

Terahertz doesn't go very far: https://en.wikipedia.org/wiki/Terahertz_wave

Also, what does that have to do with the chemical key system that they show?

Seems like a video of put-together vaguely related things to lend credibility to something that's not real.