Forget About Melting Steel with Sunshine… How About Rocks? (Video)

2 Square Meters of Sunlight is All it Takes
Last post, I wrote about a cool video that showed how a solar oven could be used to melt steel. It’s a good demonstration of just how much solar energy is hitting the Earth (it’s one thing to know abstractly, but it’s much more memorable to see it in action). Here’s another very cool video in the same vein, except that they don’t just stick to steel (which has a melting point of approx. 1,370 °C/2,500 °F). The best quote of the video, hands down, is: “If you had three people sun-bathing, they would collect that amount of sunshine, [and] despite having to travel 93 million miles, [that amount of] energy from the sun can melt rock.” Check out the video below.

On average, there’s about 1.366 kilowatts per square meter (kW/m²) of solar radiation hitting the surface of the Earth at any moment (on the day side, obviously).

Courtesy: BBC, treehugger

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