3 ms·
You don't need solar cells to heat water to boiling, just glass or a metal like aluminum or silver. With glass you can build a lens to concentrate light. With
by windows_tips 8y ago
You don't need solar cells to heat water to boiling, just glass or a metal like aluminum or silver.
With glass you can build a lens to concentrate light. With a metal you can build a concentrating mirror.
- codeisawesome 8y agoGood points. But lens building is a complex endeavour that requires tooling at the manufacturing level (especially computing power!) - no matter the choice of available material, yes? Doing it with high precision at a civilisation-powering scale seems like an impossible ask of a species that was still considering much of their Home planet to be “new” (Americas).
- windows_tips 8y agoGalileo was making lenses hundreds of years before the time we are talking about. Also, eye and magnifying glasses existed then.