3 ms·
For a fun visual demonstration, check out nighthawkinlight's video where he runs a flamefront through one -- https://www.youtube.com/watch?v=tcV1EYSUQME https:/
by showerst 5y ago
For a fun visual demonstration, check out nighthawkinlight's video where he runs a flamefront through one -- https://www.youtube.com/watch?v=tcV1EYSUQME https://www.youtube.com/watch?v=tcV1EYSUQME
Also seconding the Huygen's optics video osamagirl69 already posted below -- https://www.youtube.com/watch?v=gQnmP7UD_zk https://www.youtube.com/watch?v=gQnmP7UD_zk