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It is not possible. If you could build such an optical system, you would have a perpetual motion machine of the second kind. Suppose you would have a passive (no batteries allowed) optical system capable of creating images brighter than the source at which you aim it. You aim this device at the sun and thereby create an image brighter and hotter than the ...


The problem is that you'd need your flat mirrors to be the same sort of size, if not larger, than your liquid mirror. But the whole point of liquid mirrors is that you can make very large mirrors without the problems of the mirrors deforming under their own weight. So your suggestion just exchanges the problem of making a very large parabolic mirror for the ...

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