Zobrazení otázky a odpovědí
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Beze slov...
4398 otázku odeslal(a) Ondřej v Pondělí 22.Října 2007 19:48:23
http://www.its.caltech.edu/%7Eatomic/snowcrystals/
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Re: Beze slov...
1 odpověď odeslal(a) MarLuk v Pondělí 22.Října 2007 21:05:31
Kráááása...děkuji
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Re: Beze slov...
2 odpověď odeslal(a) falcon v Pondělí 22.Října 2007 21:56:19
opravdu - beze slov. Zamrznul jsem u těch obrázků dlouho!
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Re: Beze slov...
3 odpověď odeslal(a) Zajíc v Pondělí 22.Října 2007 22:37:31
Kásné, a tohle je na té stránce též:
1611 -- Johannes Kepler
more on Kepler... In 1611 Johannes Kepler published a short treatise On the Six-Cornered Snowflake, [1] which was the first scientific reference to snow crystals. Kepler pondered the question of why snow crystals always exhibit a six-fold symmetry. Although he doesn't refer to the atomistic viewpoint, Kepler does speculate that the hexagonal close-packing of spheres may have something to do with the morphology of snow crystals. Kepler was astute in recognizing that the genesis of crystalline symmetry was an interesting scientific question, and he also realized that he did not have the means to answer it. It would be 300 years before Kepler's question could finally be answered, requiring the development of X-ray crystallography.
"Each single plant has a single animating principle of its own, since each instance of a plant exists separately, and there is no cause to wonder that each should be equipped with its own peculiar shape. But to imagine an individual soul for each and any starlet of snow is utterly absurd, and therefore the shapes of snowflakes are by no means to be deduced from the operation of soul in the same way as with plants." -- Kepler, 1611 [1]
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Re: Beze slov...
4 odpověď odeslal(a) Jan Šalomoun v Úterý 23.Října 2007 15:10:24
Opravdu nádhera. Velmi poučné je to srovnání s tím, jak vypadají vločky z technického sněhu :-)
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Re: Beze slov...
5 odpověď odeslal(a) Marcela Machovičová ve Čtvrtek 25.Října 2007 09:54:49
Ano, slova nejsou třeba.Máca