[list][*][url=https://en.wikipedia.org/wiki/Ibn_Sahl]https://en.wikipedia.org/wiki/Ibn_Sahl[/url][br][/*][*][url=http://fyzika.jreichl.com/main.article/view/1475-arabska-optika]http://fyzika.jreichl.com/main.article/view/1475-arabska-optika[/url][br][/*][*][url=https://www.youtube.com/watch?v=faQmHzY29Zc]https://www.youtube.com/watch?v=faQmHzY29Zc[/url] - 18:12[br][/*][*][url=https://en.wikipedia.org/wiki/Snell%27s_law]https://en.wikipedia.org/wiki/Snell%27s_law[/url][br][/*][*][url=http://www.historyofinformation.com/expanded.php?id=2413]http://www.historyofinformation.com/expanded.php?id=2413[/url][br][/*][*][url=http://www.refractometer.pl/Snell-law]http://www.refractometer.pl/Snell-law[/url][br][/*][*][url=http://muj.optol.cz/~bajer/skripta/kap1_optika1.pdf]Jirka Bayer - Optika (ukázka - 94 stran)[/url][br][/*][*][url=http://www.schoolphysics.co.uk/age16-19/Wave%20properties/Wave%20properties/text/Theories_of_light/index.html]http://www.schoolphysics.co.uk/age16-19/Wave%20properties/Wave%20properties/text/Theories_of_light/index.html[/url][br][/*][/list]