Word: 1960âº
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...principle of the magnifying glass he was able to capture half of the sun's 6,000º heat. With a big specially-built heliostat (reflector) he reflected sunlight on a focusing mirror; the mirror concentrated the rays, focused them on a piece of zirconium oxide, which melts at 1960º C. The zirconium oxide was liquefied. Chemist Sosman estimated he had produced a temperature of 3,000º...
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