❝Parabolic mirror lights cigarette during Operation Teapot at the Nevada Test Site in 1955❞ ¡¡ ALARUM - CAUTION - ALARUM !! - lighting of a cigarette depicted. OK - not allthat material, really; but I just thought it kind of fits: focussing of light produced at great distance sufficiently to ignite.
/r/flatearth: /r/flatearth - Is the Earth actually flat? Where's the edge? How come we don't fall out? What about gravity? Learn all of this and more at this very serious subreddit. - May 9, 2022 - 15:23