I have written in the past about Augustin-Jean Fresnel (1788-1827) whose remarkable invention, the Fresnel Lens, revolutionized lighthouse illumination (see https://villagecraftsmen.blogspot.com/2017/09/ocracokes-fresnel-lens.html).
Last month my 14-year-old grandson, Lachlan Howard, wrote a short essay about the Fresnel Lens and its wider use in the theater, solar ovens, cameras, and industry. I had never thought about these alternate uses for Fresnel lenses.
We have published Lachlan's essay as our October Newsletter. You can read it here: https://www.villagecraftsmen.com/the-fresnel-lens/.
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Jason, sorry about that. I just fixed the link.Delete