breaking news: the sun is free

by twit

a solar furnace via kottke.org:

https://i1.wp.com/www.kottke.org/plus/misc/images/solar-furnace.jpg

A solar furnace is a structure used to harness the rays of the sun in order to produce high temperatures. This is achieved by using a curved mirror (or an array of mirrors) acting as a parabolic reflector to concentrate light (Insolation) on to a focal point. The temperature at the focal point may reach up to 3,000 degrees Celsius, and this heat can be used to generate electricity, melt steel or make hydrogen fuel.”

and an ancient legend to go with it:

“In the 3rd century BC, Archimedes allegedly used a mirror to burn up the entire Roman fleet during the siege of Syracuse:

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