[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.nucleus.cz\/soucasna-doba-si-zada-presnost\/#Article","mainEntityOfPage":"https:\/\/www.nucleus.cz\/soucasna-doba-si-zada-presnost\/","headline":"Sou\u010dasn\u00e1 doba si \u017e\u00e1d\u00e1 p\u0159esnost","name":"Sou\u010dasn\u00e1 doba si \u017e\u00e1d\u00e1 p\u0159esnost","description":"
 Od doby, kdy se stal \u010dlov\u011bk \u010dlov\u011bkem, z\u00edskal tak\u00e9 pot\u0159ebu m\u011b\u0159it \u010das. Prvn\u00ed p\u0159edstavu o prob\u00edhaj\u00edc\u00edm \u010dase z\u00edskal \u010dlov\u011bk pozorov\u00e1n\u00edm st\u00e1le se opakuj\u00edc\u00edch p\u0159\u00edrodn\u00edch… ","datePublished":"2017-08-14","dateModified":"2023-05-06","author":{"@type":"Person","@id":"https:\/\/www.nucleus.cz\/author\/#Person","name":"","url":"https:\/\/www.nucleus.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/2b882a21216b34ba28e79730eea9356b725e9a0bf9885ae3bedd792ae606fb10?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/2b882a21216b34ba28e79730eea9356b725e9a0bf9885ae3bedd792ae606fb10?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"nucleus.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.nucleus.cz\/wp-content\/uploads\/img_a297611_w2020_t1508013738.jpg","url":"https:\/\/www.nucleus.cz\/wp-content\/uploads\/img_a297611_w2020_t1508013738.jpg","height":0,"width":0},"url":"https:\/\/www.nucleus.cz\/soucasna-doba-si-zada-presnost\/","about":["Produkty"],"wordCount":393,"articleBody":"
 Od doby, kdy se stal \u010dlov\u011bk \u010dlov\u011bkem, z\u00edskal tak\u00e9 pot\u0159ebu m\u011b\u0159it \u010das. Prvn\u00ed p\u0159edstavu o prob\u00edhaj\u00edc\u00edm \u010dase z\u00edskal \u010dlov\u011bk pozorov\u00e1n\u00edm st\u00e1le se opakuj\u00edc\u00edch p\u0159\u00edrodn\u00edch jev\u016f. Kdy\u017e se \u010dlov\u011bk stal technicky zdatn\u011bj\u0161\u00edm, za\u010dal k m\u011b\u0159en\u00ed \u010dasu pou\u017e\u00edvat r\u016fzn\u00e9 jednoduch\u00e9 pom\u016fcky. V\u011bda je ozna\u010duje jako element\u00e1rn\u00ed \u010dasom\u011brn\u00e9 p\u0159\u00edstroje.
 o Ve starov\u011bku slou\u017eily k m\u011b\u0159en\u00ed \u010dasu hodiny slune\u010dn\u00ed. 
 – Nejprve byly pevn\u00e9 a pozd\u011bji se daly i p\u0159en\u00e1\u0161et.
 o Vedle slune\u010dn\u00edch hodin byly pou\u017e\u00edv\u00e1ny hodiny vodn\u00ed.
 – Ty se prosadily p\u0159edev\u0161\u00edm v Egypt\u011b, \u0158ecku, \u010c\u00edn\u011b a Indii.
 Oba typy hodin m\u011bly sv\u00e9 velk\u00e9 nev\u00fdhody. Slune\u010dn\u00ed hodiny dok\u00e1zaly m\u011b\u0159it \u010das pouze s pomoc\u00ed slune\u010dn\u00edho svitu a vodn\u00ed hodiny m\u011b\u0159ily \u010das pouze n\u011bkolik hodin.
 
 P\u016fjde to je\u0161t\u011b p\u0159esn\u011bji?
 Obyvatel\u00e9 starov\u011bku by se asi nesta\u010dili divit, kdyby spat\u0159ili dne\u0161n\u00ed mal\u00e9 technick\u00e9 z\u00e1zraky. V\u011b\u0159\u00edm, \u017ee atomov\u00e9 hodiny by jim doslova vyrazily dech. Zat\u00edmco p\u0159es\u00fdpac\u00ed nebo vodn\u00ed hodiny asi p\u0159esnost\u00ed nevynikaly, odchylka atomov\u00fdch hodin \u010din\u00ed maxim\u00e1ln\u011b jednu sekundu za sto pades\u00e1t mili\u00f3n\u016f let. NEUV\u011a\u0158ITELN\u00c9! T\u00e9m\u011b\u0159 absolutn\u00ed p\u0159esnost. To z\u0159ejm\u011b ve starov\u011bku, pokud n\u011bkdo zapomn\u011bl dol\u00edt nebo oto\u010dit, musel nastat \u010dasov\u00fd chaos. Nebo se t\u00edm a\u017e tak nezab\u00fdvali.
 o Prvn\u00ed atomov\u00e9 hodiny byly sestrojeny v Americe u\u017e roku 1949.
 o Jejich vznik byl skute\u010dnou revoluc\u00ed v m\u011b\u0159en\u00ed \u010dasu.
 Atomov\u00e9 hodiny se vyu\u017e\u00edvaj\u00ed p\u0159edev\u0161\u00edm v hv\u011bzd\u00e1rn\u00e1ch, laborato\u0159\u00edch nebo vysokorychlostn\u00edch letadlech. A dalo by se \u0159\u00edci, \u017ee maj\u00ed nadvl\u00e1du nad v\u0161emi ostatn\u00edmi m\u011b\u0159i\u010di \u010dasu. Podle nich se \u0159\u00edd\u00ed hodiny cel\u00e9ho sv\u011bta.
 – Dal\u0161\u00ed pokrok znamenaly elektronick\u00e9 hodiny, kter\u00e9 jsou \u0159\u00edzen\u00e9 krystalem.
 – Nejpou\u017e\u00edvan\u011bj\u0161\u00edmi krystaly jsou k\u0159emen a k\u0159i\u0161\u0165\u00e1l.
 Elektronick\u00e9 hodiny sice nejsou tak dokonale p\u0159esn\u00e9 jako atomov\u00e9, p\u0159esto jsou mnohem p\u0159esn\u011bj\u0161\u00ed ne\u017eli mechanick\u00e9. Ty u\u017e jsou dnes sp\u00ed\u0161e nostalgickou p\u0159ipom\u00ednkou minul\u00fdch let. P\u016fjde pokrok v m\u011b\u0159en\u00ed \u010dasu je\u0161t\u011b d\u00e1l?                                                                                                                                                                                                                                                                                                                                                                                        4.7\/5 - (7 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Sou\u010dasn\u00e1 doba si \u017e\u00e1d\u00e1 p\u0159esnost","item":"https:\/\/www.nucleus.cz\/soucasna-doba-si-zada-presnost\/#breadcrumbitem"}]}]