"Researchers at Rice University have devised a way to boil water using only sunlight - and small carbon or metal particles, which are smaller than a wavelength of light, which reflect the sun's rays and heat the water."
https://www.zdnet.com/article/how-to-boil-water-using-only-sunlight/
"Solar Kettle can boil water simply by using sunlight"
https://newatlas.com/solar-kettle/27594/
"LARGE FRESNEL LENS"
What is a Superconductor?
https://www.nasa.gov/audience/forstudents/9-12/features/superconductor_feature.html
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