Where are you, fellow enthusiasts?

Maybe I missed something because the characters were speaking very quickly and intelligently in a sophisticated manner at that moment, but I managed to catch "wave nature of light" and "180 degrees."
Or maybe they were talking about some kind of quantum particles, saying that matter can also have a wave nature, and if the matter of those guys is not vibrating in the same way as the matter of humans, then we don't perceive them. I don't know, maybe I'm wrong, but I don't feel like rewatching that episode.