I’m way behind in my YouTube watching (too much Zelda) but finally watched this vid today. It doesn’t have anything to do with laser cutters, but it does feature visible light lasers very heavily and they touch on some subjects that have been discussed elsewhere in the forum. I hope y’all give it a watch and enjoy!
There isn’t actually a whole lot of math in this video, which is a departure from most videos on the YouTube channel, so don’t worry if math isn’t really your thing. If math (or “maths” as it’s known in some places) is your thing though, other videos on the channel would prolly interest you so are worth a look.