How was it discovered? And what were its uses before electrical generation? Its for a powerpoint project. And I need a source, and no answers that are like, "I’m a teacher, so I know." Just a website would be appreciated =) thank you.
I’m sure the first humans knew to have their cave opening face the south, to be warmed. And they knew that the sun warmed their skin and clothing.
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I found a website and there’s pictures!!
References :
http://en.wikipedia.org/wiki/Solar_thermal_energy
I’m sure the first humans knew to have their cave opening face the south, to be warmed. And they knew that the sun warmed their skin and clothing.
References :