[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.garola.cz\/svetlo-a-osvetleni\/#Article","mainEntityOfPage":"https:\/\/www.garola.cz\/svetlo-a-osvetleni\/","headline":"Sv\u011btlo a osv\u011btlen\u00ed","name":"Sv\u011btlo a osv\u011btlen\u00ed","description":"Sv\u011btlem se rozum\u00ed viditeln\u00e9 z\u00e1\u0159en\u00ed o vlnov\u00fdch d\u00e9lk\u00e1ch 380-770 nanometr\u016f. P\u0159edpona \u201enano\u201c znamen\u00e1 hodnotu 10-9, jedn\u00e1 se tedy o velmi malou hodnotu. Krat\u0161\u00ed vlny le\u017e\u00ed […]","datePublished":"2019-10-04","dateModified":"2023-04-26","author":{"@type":"Person","@id":"https:\/\/www.garola.cz\/author\/#Person","name":"","url":"https:\/\/www.garola.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/0c97be8873d84c78e7a3da39294dc9e209ea44cdddcf1d79ac5ad761aa3cfc7f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/0c97be8873d84c78e7a3da39294dc9e209ea44cdddcf1d79ac5ad761aa3cfc7f?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"garola.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.garola.cz\/wp-content\/uploads\/img_a357051_w3030_t1571730235.jpg","url":"https:\/\/www.garola.cz\/wp-content\/uploads\/img_a357051_w3030_t1571730235.jpg","height":0,"width":0},"url":"https:\/\/www.garola.cz\/svetlo-a-osvetleni\/","about":["Elektro"],"wordCount":402,"articleBody":"Sv\u011btlem se rozum\u00ed viditeln\u00e9 z\u00e1\u0159en\u00ed o vlnov\u00fdch d\u00e9lk\u00e1ch 380-770 nanometr\u016f. P\u0159edpona \u201enano\u201c znamen\u00e1 hodnotu 10-9, jedn\u00e1 se tedy o velmi malou hodnotu. Krat\u0161\u00ed vlny le\u017e\u00ed ve fialov\u00e9m spektru barev a jsou zn\u00e1m\u00e9 jako ultrafialov\u00e9 z\u00e1\u0159en\u00ed neboli \u201eUV\u201c. Dovedou ubl\u00ed\u017eit i pomoci – od sp\u00e1len\u00e9 poko\u017eky a bolav\u00fdch o\u010d\u00ed a\u017e po l\u00e9\u010div\u00e9 \u00fa\u010dinky tzv. \u201ehorsk\u00e9ho slunka\u201c. Dlouh\u00e9 vlny naopak le\u017e\u00ed v\u00a0\u010derven\u00e9m barevn\u00e9m spektru a pat\u0159\u00ed do infra\u010derven\u00e9ho z\u00e1\u0159en\u00ed. To se vyu\u017e\u00edv\u00e1 k\u00a0r\u016fzn\u00e9mu nah\u0159\u00edv\u00e1n\u00ed apod.\tSv\u011bteln\u00e9 zdroje a jednotky\tSv\u011btla si m\u016f\u017eeme u\u017e\u00edvat d\u00edky sv\u011bteln\u00fdm zdroj\u016fm, kter\u00e9 mohou b\u00fdt jak p\u0159\u00edrodn\u00ed (Slunce, ohe\u0148, blesk), tak um\u011bl\u00e9 vznikl\u00e9 p\u0159em\u011bnou n\u011bjak\u00fdm druhem energie (chemick\u00e1, biologick\u00e1, elektrick\u00e1). Ty um\u011bl\u00e9 lze rozd\u011blit na elektroluminescen\u010dn\u00ed – sem pat\u0159\u00ed LED diody – a teplotn\u00ed, kter\u00fdmi jsou t\u0159eba \u017e\u00e1rovky \u010di lampy.\tS\u00a0ohledem na osv\u011btlen\u00ed n\u00e1s zaj\u00edmaj\u00ed zejm\u00e9na dv\u011b jednotky. Prvn\u00ed uv\u00e1d\u00ed mno\u017estv\u00ed vyza\u0159ovan\u00e9ho sv\u011btla a jedn\u00e1 se o \u201ejednotku sv\u011bteln\u00e9ho toku\u201c lumen (zna\u010dka lm). Je\u0161t\u011b je mo\u017en\u00e9 se v\u00a0t\u00e9to souvislosti setkat s \u201ejednotkou osv\u011btlenosti\u201c lux (zna\u010dka lx), kter\u00e1 ozna\u010duje hustotu sv\u011bteln\u00e9ho toku, tedy kolik lumen\u016f dopadne na ka\u017edou plochu.\tTeplota a barva sv\u011btla\tS\u00a0osv\u011btlen\u00edm rovn\u011b\u017e souvis\u00ed barva \u010di teplota sv\u011btla. Jednotkou teploty je Kelvin (zna\u010dka K) a podle n\u00ed je mo\u017en\u00e9 stanovit barvu \u010d\u00e1sti viditeln\u00e9ho spektra vyza\u0159ovan\u00e9ho dan\u00fdm zdrojem. Klasick\u00e9 a halogenov\u00e9 \u017e\u00e1rovky m\u00edvaj\u00ed teplotu 3\u00a0000-3\u00a0500 K a t\u00edm i barvu v\u00a0\u010derven\u00e9 \u010d\u00e1sti spektra, viditelnou obdobn\u011b jako denn\u00ed sv\u011btlo, pevn\u011b danou wolframov\u00fdm vl\u00e1knem, ale LED zdroje a v\u00fdbojky mohou m\u00edt barvu r\u016fznou, kup\u0159\u00edkladu v\u00a0z\u00e1vislosti na jejich n\u00e1plni. Z\u00e1\u0159ivky pak mohou m\u00edt barvu teplou b\u00edlou (asi 2 700 K), denn\u00ed b\u00edlou (cca 3\u00a0500 K) a studenou denn\u00ed b\u00edlou (p\u0159es 5\u00a0500 K).Jeden \u010das se hojn\u011b hled\u011blo i na ekologii, dnes nen\u00ed nutn\u00e9 se t\u00edm p\u0159\u00edli\u0161 zat\u011b\u017eovat. Obsah rtuti se sn\u00ed\u017eil na \u00fapln\u00e9 minimum a sv\u011bteln\u00e9 zdroje maj\u00ed dob\u0159e dostupn\u00e1 sb\u011brn\u00e1 m\u00edsta k jejich zp\u011btn\u00e9mu odb\u011bru                                                                                                                                                                                                                                                                                                                                                                                        4.6\/5 - (7 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Sv\u011btlo a osv\u011btlen\u00ed","item":"https:\/\/www.garola.cz\/svetlo-a-osvetleni\/#breadcrumbitem"}]}]