[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.iceandfire.cz\/co-je-to-vlastne-svetlo\/#Article","mainEntityOfPage":"https:\/\/www.iceandfire.cz\/co-je-to-vlastne-svetlo\/","headline":"Co je to vlastn\u011b sv\u011btlo","name":"Co je to vlastn\u011b sv\u011btlo","description":"Zamysl\u00edme-li se nad t\u00edm, co to vlastn\u011b sv\u011btlo je, ve skute\u010dnosti se pot\u00fdk\u00e1me se dv\u011bma rozd\u00edln\u00fdmi pohledy &#8211; s iluzorn\u00edm obrazem, jak\u00fd n\u00e1m vytv\u00e1\u0159\u00ed n\u00e1\u0161 zrakov\u00fd org\u00e1n, a o co se jedn\u00e1 ve skute\u010dnosti z fyzik\u00e1ln\u00edho hlediska. Sv\u011btlo a ve\u0161ker\u00e9 barvy tohoto materi\u00e1ln\u00edho sv\u011bta v duhov\u00fdch odst\u00ednech od \u010derven\u00e9 a\u017e po fialovou pozorujeme jako kr\u00e1sn\u00fd &hellip; <p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/www.iceandfire.cz\/co-je-to-vlastne-svetlo\/\"> \u010c\u00edst d\u00e1le<span class=\"screen-reader-text\">  \u010c\u00edst d\u00e1le<\/span><\/a><\/p>","datePublished":"2018-10-22","dateModified":"2023-05-05","author":{"@type":"Person","@id":"https:\/\/www.iceandfire.cz\/author\/#Person","name":"iceandfire.cz\n","url":"https:\/\/www.iceandfire.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/01173f1da90dde8adb887d6793fa4e42c4004e53f8d645d9b1cb57c2dee8e188?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/01173f1da90dde8adb887d6793fa4e42c4004e53f8d645d9b1cb57c2dee8e188?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"iceandfire.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.iceandfire.cz\/wp-content\/uploads\/img_a326310_w2360_t1538471743.jpg","url":"https:\/\/www.iceandfire.cz\/wp-content\/uploads\/img_a326310_w2360_t1538471743.jpg","height":0,"width":0},"url":"https:\/\/www.iceandfire.cz\/co-je-to-vlastne-svetlo\/","about":["N\u00e1kupy"],"wordCount":429,"articleBody":"Zamysl\u00edme-li se nad t\u00edm, co to vlastn\u011b sv\u011btlo je, ve skute\u010dnosti se pot\u00fdk\u00e1me se dv\u011bma rozd\u00edln\u00fdmi pohledy &#8211; s iluzorn\u00edm obrazem, jak\u00fd n\u00e1m vytv\u00e1\u0159\u00ed n\u00e1\u0161 zrakov\u00fd org\u00e1n, a o co se jedn\u00e1 ve skute\u010dnosti z fyzik\u00e1ln\u00edho hlediska. Sv\u011btlo a ve\u0161ker\u00e9 barvy tohoto materi\u00e1ln\u00edho sv\u011bta v duhov\u00fdch odst\u00ednech od \u010derven\u00e9 a\u017e po fialovou pozorujeme jako kr\u00e1sn\u00fd obraz a vytv\u00e1\u0159\u00edme si o n\u011bm svou vlastn\u00ed p\u0159edstavu. Nejl\u00e9pe ji vystihuj\u00ed v\u00fdtvarn\u00edci \u2013 mal\u00ed\u0159i, grafici, socha\u0159i, design\u00e9\u0159i, sna\u017e\u00ed se j\u00ed vtisknout n\u011bjakou podobu a tvar.&#13; Jinou \u0159e\u010d\u00ed ale hovo\u0159\u00ed fyzik\u00e1ln\u00ed z\u00e1kony. Jde o elektromagnetick\u00e9 z\u00e1\u0159en\u00ed, je to forma energie, kter\u00e1 se \u0161\u00ed\u0159\u00ed prostorem v rozmez\u00ed vlnov\u00fdch d\u00e9lek od 760 do 380 nanometr\u016f. Ka\u017ed\u00e1 vlnov\u00e1 d\u00e9lka vyjad\u0159uje svou vlastn\u00ed barvu a tu lidsk\u00e9 oko vn\u00edm\u00e1 fotocitliv\u00fdmi receptory. Elektromagnetick\u00e9 z\u00e1\u0159en\u00ed m\u00e1 v\u0161ak mnohem v\u011bt\u0161\u00ed vlnov\u00fd rozsah, nap\u0159. r\u00e1diov\u00e9 vlny m\u011b\u0159\u00edme v metrech a\u017e milimetrech, mikrovlnn\u00e9 z\u00e1\u0159en\u00ed nap\u0159. bezdr\u00e1tov\u00e9 wi-fi v mikrometrech, infra\u010derven\u00e9 z\u00e1\u0159en\u00ed v nanometrech a to pak pokra\u010duje sv\u011bteln\u00fdm spektrem, kter\u00e9 kon\u010d\u00ed velmi kr\u00e1tk\u00fdmi ultrafialov\u00fdmi paprsky a gama z\u00e1\u0159en\u00edm.&#13; &#13; Barva sv\u011btla&#13; &#13; V\u0161ichni dob\u0159e zn\u00e1me duhu, kter\u00e1 se na obloze objev\u00ed po de\u0161ti ve svitu slune\u010dn\u00edch paprsk\u016f. Duha se tak\u00e9 dob\u0159e rozkl\u00e1d\u00e1 v transparentn\u00edch krystalech. Zrakem tedy pozorujeme celou plej\u00e1du sv\u011bteln\u00e9ho z\u00e1\u0159en\u00ed tak, jak jde po sob\u011b od \u010derven\u00e9 p\u0159es oran\u017eovou, \u017elutou, zelenou, modrou, a\u017e k fialov\u00e9.&#13; &#13; Rychlost sv\u011btla&#13; &#13; Jakou rychlost\u00ed se sv\u011btlo \u0161\u00ed\u0159\u00ed ve vakuu, ji\u017e bylo zm\u011b\u0159eno. Je to p\u0159ibli\u017en\u011b 300 tis\u00edc kilometr\u016f za sekundu. Rychlost sv\u011bteln\u00e9ho paprsku se vlivem vzduchov\u00e9 hmoty sni\u017euje a v\u00fdrazn\u011b ni\u017e\u0161\u00ed je nap\u0159. ve skle, kde kles\u00e1 a\u017e o jednu t\u0159etinu. Proto tak\u00e9 m\u016f\u017eeme snadno odvodit, \u017ee sv\u011bteln\u00e9mu paprsku odra\u017een\u00e9mu od slune\u010dn\u00edho povrchu trv\u00e1 v\u00edce ne\u017e 8 minut, ne\u017e doraz\u00ed k n\u00e1m na zemsk\u00fd povrch . Mo\u017en\u00e1 v\u00e1s napadne, \u017ee kosmick\u00e1 m\u011b\u0159\u00edtka jsou skute\u010dn\u011b impozantn\u00ed, nap\u0159. vzd\u00e1lenost nejbli\u017e\u0161\u00ed hv\u011bzdy Alfa Centauri, jej\u00ed\u017e sv\u011btlo k n\u00e1m na Zemi putuje p\u0159ibli\u017en\u011b 4 roky, zat\u00edmco nejvzd\u00e1len\u011bj\u0161\u00ed objekty ve vesm\u00edru, tzv. kvasary, jsou od n\u00e1s vzd\u00e1leny miliony sv\u011bteln\u00fdch let, sv\u011btlo tedy odtud putuje miliony let.&#13;                                                                                                                                                                                                                                                                                                                                                                                         4.3\/5 - (12 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Co je to vlastn\u011b sv\u011btlo","item":"https:\/\/www.iceandfire.cz\/co-je-to-vlastne-svetlo\/#breadcrumbitem"}]}]