[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.thtex.cz\/zarovky-jak-dlouho-nam-osvetluji-zivot\/#Article","mainEntityOfPage":"https:\/\/www.thtex.cz\/zarovky-jak-dlouho-nam-osvetluji-zivot\/","headline":"\u017d\u00e1rovky: jak dlouho n\u00e1m osv\u011btluj\u00ed \u017eivot","name":"\u017d\u00e1rovky: jak dlouho n\u00e1m osv\u011btluj\u00ed \u017eivot","description":"Jak dlouh\u00e1 doba to je, co Thomas Alva Edison zdokonalil elektrick\u00fd oblouk v\u00a0ba\u0148ce t\u00edm, \u017ee z\u00a0\u017e\u00e1rovky ods\u00e1l vzduch a vytvo\u0159il v\u00a0n\u00ed \u010d\u00e1ste\u010dn\u00e9 vakuum? Uhl\u00edkov\u00fd dr\u00e1t … ","datePublished":"2019-06-01","dateModified":"2023-05-11","author":{"@type":"Person","@id":"https:\/\/www.thtex.cz\/author\/#Person","name":"","url":"https:\/\/www.thtex.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/774cfd57496a9f02284489749b4229073861faca9d8a66df7d65507a77c5d31f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/774cfd57496a9f02284489749b4229073861faca9d8a66df7d65507a77c5d31f?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"thtex.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.thtex.cz\/wp-content\/uploads\/img_a346710_w2356_t1561025928.jpg","url":"https:\/\/www.thtex.cz\/wp-content\/uploads\/img_a346710_w2356_t1561025928.jpg","height":0,"width":0},"url":"https:\/\/www.thtex.cz\/zarovky-jak-dlouho-nam-osvetluji-zivot\/","wordCount":411,"articleBody":"Jak dlouh\u00e1 doba to je, co Thomas Alva Edison zdokonalil elektrick\u00fd oblouk v\u00a0ba\u0148ce t\u00edm, \u017ee z\u00a0\u017e\u00e1rovky ods\u00e1l vzduch a vytvo\u0159il v\u00a0n\u00ed \u010d\u00e1ste\u010dn\u00e9 vakuum? Uhl\u00edkov\u00fd dr\u00e1t uvnit\u0159 \u017e\u00e1rovky n\u00e1sledn\u011b nemohl ihned sho\u0159et, proto\u017ee k\u00a0tomu nem\u011bl kysl\u00edk. Vymyslel tak\u00e9 sv\u016fj specifick\u00fd z\u00e1vit, kter\u00e9mu se dodnes \u0159\u00edk\u00e1 Edison\u016fv a u\u017e\u00edv\u00e1 se na v\u0161ech \u017e\u00e1rovk\u00e1ch dne\u0161ka. Proto nesou na obalech sv\u011btla ozna\u010den\u00ed nap\u0159\u00edklad E 27 (Edison pr\u016fm\u011br 27 mm). Ud\u00e1lo se to v\u00a0roce 1879 a do dne\u0161ka z\u00a0p\u016fvodn\u00edho konceptu sv\u00edtidla z\u016fstal u\u017e jenom ten z\u00e1vit.\tKlasick\u00e1 vl\u00e1knov\u00e1 \u017e\u00e1rovka se dr\u017eela na trhu a\u017e do 80. let minul\u00e9ho stolet\u00ed, kdy byla houfn\u011b nahrazov\u00e1na plynov\u00fdmi z\u00e1\u0159ivkami, kter\u00e9 funguj\u00ed na principu z\u00e1\u0159en\u00ed ionizovan\u00e9ho plynu v\u00a0uzav\u0159en\u00e9 n\u00e1dob\u011b. Plyn byl slo\u017een ze rtuti a argonu, kter\u00fd p\u0159i ionizaci z\u00e1\u0159il v\u00a0neviditeln\u00e9m spektru, kter\u00e9 dopad\u00e1 na st\u011bny n\u00e1doby pot\u0159en\u00e9 l\u00e1tkou s\u00a0vlastnost\u00ed luminiscence. Ta emituje b\u00edl\u00e9 sv\u011btlo o dan\u00e9 teplot\u011b barev. M\u011bly mnohem men\u0161\u00ed spot\u0159ebu, ne\u017e jejich p\u0159edch\u016fdci \u2013 \u017e\u00e1rovky. M\u011bly v\u0161ak \u0159adu nev\u00fdhod, jako nap\u0159\u00edklad to, \u017ee jejich jas se nedal nijak m\u011bnit. Luminofor z\u00e1\u0159\u00ed st\u00e1le stejn\u011b nez\u00e1visle na intenzit\u011b proudu a nap\u011bt\u00ed. D\u00e1le p\u0159i zapojen\u00ed na st\u0159\u00eddav\u00fd proud m\u011bly probl\u00e9m s\u00a0t\u00edm, \u017ee nesv\u00edtily neust\u00e1le ale blikaly tak, jak k\u00a0nim p\u0159ich\u00e1zel proud. M\u016f\u017eete si toho v\u0161imnout nap\u0159\u00edklad na kamerov\u00e9m z\u00e1znamu, kdy sv\u011btlo jakoby blik\u00e1.\tV\u00a0modern\u00ed dob\u011b p\u0159evl\u00e1daj\u00ed na trhu LEDky. Co\u017e je zkratka pro Light Emitting Diode, neboli dioda emituj\u00edc\u00ed sv\u011btlo. Maj\u00ed naprosto mizivou spot\u0159ebu, neblikaj\u00ed a lze je vyrobit v\u00a0jak\u00e9koliv barv\u011b sv\u011btla, a to docela p\u0159esn\u011b. A nevyu\u017e\u00edvaj\u00ed se jen v\u00a0b\u011b\u017en\u00fdch sv\u00edtidlech ale i nap\u0159\u00edklad ve v\u011bt\u0161in\u011b displej\u016f u telefon\u016f, televize nebo monitor\u016f.\t\tD\u00e1 se tedy \u0159\u00edct, \u017ee \u017e\u00e1rovky \u2013 ty p\u016fvodn\u00ed n\u00e1m ji\u017e \u017eivot neosv\u011btluj\u00ed. Ov\u0161em bez nich bychom nikdy nedo\u0161li tak daleko jako je tomu dnes. Po t\u00e9m\u011b\u0159 dv\u011b stolet\u00ed n\u00e1m umo\u017e\u0148ovaly vid\u011bt, pracovat a \u017e\u00edt i ve tm\u011b. A to u\u017e je z\u00e1sluha.\t\u00a0                                                                                                                                                                                                                                                                                                                                                                                        3.9\/5 - (8 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"\u017d\u00e1rovky: jak dlouho n\u00e1m osv\u011btluj\u00ed \u017eivot","item":"https:\/\/www.thtex.cz\/zarovky-jak-dlouho-nam-osvetluji-zivot\/#breadcrumbitem"}]}]