To be of use, solar energy must be converted into heat, electricity or mechanical power.
Heat (a.k.a. "solar thermal conversion") is one of the most popular methods for solar energy harvesting. The process involves collecting the sun's energy through optical concentrators (including mirrors or lenses), and, as the units heat up, heat is then transferred to the underlying water. Once the water temperature reaches 100°C., it converts to useful steam.
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