There was a very interesting article about how you can't focus 100's of magnifying glasses using light from the moon to start a fire, probably similar in princi

There was a very interesting article about how you can't focus 100's of magnifying glasses using light from the moon to start a fire, probably similar in principles? XKCD explainer here: https://what-if.xkcd.com/145/ https://what-if.xkcd.com/145/