Converting sunlight to electricity with solar cells has an


Converting sunlight to electricity with solar cells has an efficiency of 15%. It's possible to achieve a higher efficiency (though currently at higher cost) by using concentrated sunlight as the hot reservoir of a heat engine. Each dish in the figure concentrates sunlight on one side of a heat engine, producing a hot-reservoir temperature of 600%u2218C . The cold reservoir, ambient air, is approximately 24%u2218C. The actual working efficiency of this device is 30%.

What is the theoretical maximum efficiency?

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Physics: Converting sunlight to electricity with solar cells has an
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