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when toggle format what by license comment
Feb 24, 2018 at 6:21 answer added Maxim Umansky timeline score: 1
Feb 24, 2018 at 2:38 comment added N. Virgo It isn't possible, because you can't heat an object higher than 6000K by focusing sunlight, due to the second law. (6000K is the surface temperature of the Sun.) Hopefully someone can write a good answer explaining this in more detail.
Feb 24, 2018 at 2:31 answer added freecharly timeline score: 0
Feb 23, 2018 at 21:39 history asked user11377 CC BY-SA 3.0