Transparent lenses can actually cast shadows? A viewer’s question blew my mind!

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As a science blogger, you receive strange questions. Share interesting everyday phenomena and help shape videos—I’m very happy! Views 1770876; comments 1578; likes 123639; coins 6804; favorites 14017; shares 1015. Creator: Bi’s Second Derivative. Bio: Sharing science’s joy and beauty! Alt: Bi Dao. Business: s1012295607. Related: Once used to treat mental illness?; What if I divide 1 by 0?; A probability-changing question; the Nobel Prize as a private foundation; Is a plucked banana alive or dead?; choosing A on question four; a broken shadow; 0.5×0.8; one jin of water floating ten jin of wood; eating a roommate’s instant noodles.