Yes, they use lasers. The old MacBooks used to have the webcam light in screen bezel use this tech. It seems to be slowly disappearing (has disappeared?) from t

Yes, they use lasers. The old MacBooks used to have the webcam light in screen bezel use this tech. It seems to be slowly disappearing (has disappeared?) from their products though. https://www.patentlyapple.com/patently-apple/2011/02/apple-wins-patents-for-light-sensitive-transitive-displays.html https://www.patentlyapple.com/patently-apple/2011/02/apple-w...