We can so shape transparent substances, and so arrange them with respect to our sight and objects, that rays can be broken and bent as we please; and thus from an incredible distance we may read the smallest letters and number the grains of dust and sand, on account of the greatness of the angle under which we see them; and we may manage so as hardly to see bodies when near to us, on account of the smallness of the angle under which we cause them to be seen; for vision of this sort is not a consequence of distance, except as that affects the magnitude of the angle. And thus a boy may seem a giant, and a man a mountain."And thus a boy may seem a giant, and a man a mountain." Now that must have been a shock to the system. We didn't even know what light was really, and yet we knew it could be transformed in this crazy ways. Just worth keeping in mind while we ooh and ahh over the the latest mobile operating system.
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