{"id":5411,"date":"2025-01-10T22:16:00","date_gmt":"2025-01-10T21:16:00","guid":{"rendered":"https:\/\/www.zsvltava.cz\/fyzika\/?p=5411"},"modified":"2025-05-14T12:24:20","modified_gmt":"2025-05-14T10:24:20","slug":"ctyri-zakladni-sily-vesmiru","status":"publish","type":"post","link":"https:\/\/www.zsvltava.cz\/fyzika\/?p=5411","title":{"rendered":"\u010cty\u0159i z\u00e1kladn\u00ed s\u00edly vesm\u00edru"},"content":{"rendered":"

N\u00e1\u0161 vesm\u00edr je fascinuj\u00edc\u00edm m\u00edstem pln\u00fdm galaxi\u00ed, hv\u011bzd, planet a \u010d\u00e1stic, kter\u00e9 spolu neust\u00e1le interaguj\u00ed. V\u0161echny tyto interakce \u0159\u00edd\u00ed pouh\u00e9 \u010dty\u0159i z\u00e1kladn\u00ed s\u00edly p\u0159\u00edrody: gravitace, elektromagnetismus, siln\u00e1 jadern\u00e1 s\u00edla a slab\u00e1 jadern\u00e1 s\u00edla<\/strong>. Ka\u017ed\u00e1 z t\u011bchto sil m\u00e1 jedine\u010dn\u00e9 vlastnosti a hraje kl\u00ed\u010dovou roli v tom, jak vesm\u00edr funguje. <\/p>\n

\"\"<\/p>\n

Z\u00e1kladn\u00ed s\u00edly, kter\u00e9 ur\u010duj\u00ed fungov\u00e1n\u00ed cel\u00e9ho vesm\u00edru<\/h2>\n

Element\u00e1rn\u00ed \u010d\u00e1stice hraj\u00ed kl\u00ed\u010dovou roli p\u0159i p\u0159enosu a zprost\u0159edkov\u00e1n\u00ed z\u00e1kladn\u00edch sil, kter\u00e9 \u0159\u00edd\u00ed ve\u0161ker\u00e9 interakce v p\u0159\u00edrod\u011b. Ka\u017ed\u00e1 z t\u011bchto sil m\u00e1 svou vlastn\u00ed \u010d\u00e1stici, kter\u00e1 ji „nos\u00ed“, a to i na velmi mal\u00fdch m\u011b\u0159\u00edtk\u00e1ch, kde b\u011b\u017en\u00e9 z\u00e1kony fyziky p\u0159est\u00e1vaj\u00ed platit.<\/p>\n

Element\u00e1rn\u00ed \u010d\u00e1stice jsou z\u00e1kladn\u00ed stavebn\u00ed jednotky hmoty, kter\u00e9 nejsou slo\u017eeny z men\u0161\u00edch \u010d\u00e1stic. Jsou to nejjednodu\u0161\u0161\u00ed a nejfundament\u00e1ln\u011bj\u0161\u00ed objekty, kter\u00e9 tvo\u0159\u00ed v\u0161e kolem n\u00e1s. Pat\u0159\u00ed sem nap\u0159\u00edklad kvarky a leptonky (mezi n\u011b\u017e spadaj\u00ed elektrony a neutrina), kter\u00e9 jsou z\u00e1kladem pro slo\u017een\u00e9 \u010d\u00e1stice jako protony a neutrony. D\u00e1le mezi element\u00e1rn\u00ed \u010d\u00e1stice pat\u0159\u00ed i \u010d\u00e1stice, kter\u00e9 zprost\u0159edkov\u00e1vaj\u00ed z\u00e1kladn\u00ed s\u00edly.<\/p>\n

Gravitace<\/h3>\n

Gravitace je s\u00edla, kterou v\u0161ichni dob\u0159e zn\u00e1me, proto\u017ee n\u00e1s dr\u017e\u00ed na povrchu Zem\u011b a udr\u017euje planety na jejich drah\u00e1ch kolem Slunce. Je to nejv\u00edce p\u016fsob\u00edc\u00ed s\u00edla na velk\u00fdch vzd\u00e1lenostech, ale ve skute\u010dnosti je ze v\u0161ech \u010dty\u0159 sil nejslab\u0161\u00ed. Gravitace vznik\u00e1 v d\u016fsledku zak\u0159iven\u00ed \u010dasoprostoru hmotn\u00fdmi objekty \u2013 jak popsal Albert Einstein ve sv\u00e9 teorii relativity. V\u011bdci dosud hledaj\u00ed tzv. graviton<\/strong>, hypotetickou \u010d\u00e1stici, kter\u00e1 by gravitaci p\u0159en\u00e1\u0161ela.<\/p>\n

Elektromagnetismus<\/h3>\n

Elektromagnetismus je odpov\u011bdn\u00fd za v\u0161e, co souvis\u00ed s elekt\u0159inou, magnetismem a sv\u011btlem. Tato s\u00edla dr\u017e\u00ed pohromad\u011b atomy a molekuly, umo\u017e\u0148uj\u00ed fungov\u00e1n\u00ed elektronick\u00fdch za\u0159\u00edzen\u00ed a \u0161\u00ed\u0159en\u00ed sv\u011btla. Elektromagnetismus p\u0159en\u00e1\u0161\u00ed fotony<\/strong> \u2013 hmotnostn\u011b nulov\u00e9 \u010d\u00e1stice, kter\u00e9 n\u00e1m umo\u017e\u0148uj\u00ed vid\u011bt hv\u011bzdy na no\u010dn\u00ed obloze nebo poslouchat hudbu v reproduktorech. Tato s\u00edla je mnohem siln\u011bj\u0161\u00ed ne\u017e gravitace, ale p\u016fsob\u00ed pouze na krat\u0161\u00ed vzd\u00e1lenosti.<\/p>\n

Siln\u00e1 jadern\u00e1 s\u00edla<\/h3>\n

Siln\u00e1 jadern\u00e1 s\u00edla jsou nejmocn\u011bj\u0161\u00ed ze v\u0161ech \u010dty\u0159 sil, ale jejich p\u016fsobnost je omezen\u00e1 na extr\u00e9mn\u011b kr\u00e1tk\u00e9 vzd\u00e1lenosti uvnit\u0159 atomov\u00fdch jader. Tato s\u00edla dr\u017e\u00ed pohromad\u011b protony a neutrony v j\u00e1drech atom\u016f, p\u0159esto\u017ee se protony kv\u016fli sv\u00fdm kladn\u00fdm n\u00e1boj\u016fm odpuzuj\u00ed. Bez siln\u00e9 s\u00edly by neexistovala stabiln\u00ed atomov\u00e1 j\u00e1dra a vesm\u00edr by byl jen chaotick\u00fdm mra\u010dnem \u010d\u00e1stic. Tato s\u00edla p\u0159en\u00e1\u0161ej\u00ed gluony<\/strong>, \u010d\u00e1stice, kter\u00e9 doslova „lep\u00ed“ kvarky dohromady.<\/p>\n

Slab\u00e1 jadern\u00e1 s\u00edla<\/h3>\n

Slab\u00e1 jadern\u00e1 s\u00edla jsou kl\u00ed\u010dov\u00e1 pro procesy, jako je radioaktivn\u00ed rozpad a jadern\u00e1 f\u00fazi ve hv\u011bzd\u00e1ch. P\u0159\u00edkladem je proces, kdy neutron v atomov\u00e9m j\u00e1d\u0159e m\u016f\u017ee mutovat na proton, elektron a neutrin. Tato s\u00edla p\u0159en\u00e1\u0161ej\u00ed bosony W a Z<\/strong>, kter\u00e9 jsou pom\u011brn\u011b t\u011b\u017ek\u00e9, co\u017e omezuje jejich dosah. Slab\u00e1 s\u00edla hraj\u00ed kl\u00ed\u010dovou roli v tvorb\u011b prvk\u016f b\u011bhem nukleosynt\u00e9zy ve hv\u011bzd\u00e1ch a exploz\u00edch supernov.<\/p>\n

Obrovsk\u00e9 rozd\u00edly mezi silami<\/h2>\n

A\u010dkoliv v\u0161echny \u010dty\u0159i z\u00e1kladn\u00ed s\u00edly \u0159\u00edd\u00ed vesm\u00edr, rozd\u00edly mezi jejich intenzitou jsou ohromuj\u00edc\u00ed. Nap\u0159\u00edklad siln\u00e1 jadern\u00e1 s\u00edla je p\u0159ibli\u017en\u011b 10^38kr\u00e1t siln\u011bj\u0161\u00ed ne\u017e gravitace. Elektromagnetick\u00e1 s\u00edla je oproti gravitaci zhruba 10^36kr\u00e1t siln\u011bj\u0161\u00ed, co\u017e je d\u016fvod, pro\u010d magnet dok\u00e1\u017ee zvednout kovov\u00fd p\u0159edm\u011bt proti gravitaci cel\u00e9 Zem\u011b. Tyto rozd\u00edly maj\u00ed z\u00e1sadn\u00ed vliv na fungov\u00e1n\u00ed vesm\u00edru \u2013 zat\u00edmco gravitace dominuje na velk\u00fdch \u0161k\u00e1l\u00e1ch, jako jsou galaxie a \u010dern\u00e9 d\u00edry, siln\u00e1 a slab\u00e1 s\u00edla hraj\u00ed kl\u00ed\u010dovou roli v mikrosv\u011bt\u011b atomov\u00fdch jader.<\/p>\n

Dlouh\u00e9 hled\u00e1n\u00ed jednotn\u00e9ho popisu<\/h2>\n

Fyzici u\u017e des\u00edtky let usilovn\u011b hledaj\u00ed teorii, kter\u00e1 by sjednotila popis v\u0161ech \u010dty\u0159 z\u00e1kladn\u00edch sil. I kdy\u017e se elektromagnetick\u00e1 s\u00edla, slab\u00e1 s\u00edla a siln\u00e1 s\u00edla poda\u0159ilo \u010d\u00e1ste\u010dn\u011b propojit v r\u00e1mci standardn\u00edho modelu \u010d\u00e1sticov\u00e9 fyziky, gravitace st\u00e1le z\u016fst\u00e1v\u00e1 mimo tento r\u00e1mec. Teorie strun nebo kvantov\u00e1 gravitace jsou n\u011bkter\u00e9 z n\u00e1vrh\u016f, kter\u00e9 by mohly nab\u00eddnout jednotn\u00fd popis, ale experiment\u00e1ln\u00ed potvrzen\u00ed t\u011bchto teori\u00ed zat\u00edm chyb\u00ed. Tato v\u00fdzva je jedn\u00edm z nejv\u011bt\u0161\u00edch \u00fakol\u016f modern\u00ed v\u011bdy trvaj\u00edc\u00ed od po\u010d\u00e1tku 20. stolet\u00ed. Jedn\u00edm z nejzarputilej\u0161\u00edch hleda\u010d\u016f byl s\u00e1m Albert Einstein<\/a>, kter\u00fd str\u00e1vil hled\u00e1n\u00edm posledn\u00edch 30 let sv\u00e9ho \u017eivota.<\/p>\n

\"\"<\/p>\n

4 z\u00e1kladn\u00ed s\u00edly vesm\u00edru – shrnut\u00ed<\/h2>\n\n\n\n\n\n\n\n\n
Interakce<\/th>\nRelativn\u00ed s\u00edla<\/th>\nDosah<\/th>\nP\u0159ena\u0161e\u010d<\/th>\nP\u016fsoben\u00ed<\/th>\n<\/tr>\n<\/thead>\n
Siln\u00e1 jadern\u00e1<\/td>\n1 (nejv\u011bt\u0161\u00ed)<\/td>\n~10-15<\/sup> m (velmi kr\u00e1tk\u00fd)<\/td>\nGluony<\/td>\nDr\u017e\u00ed kvarky v protonech\/neutronech, v\u00e1\u017ee nukleony v j\u00e1d\u0159e<\/td>\n<\/tr>\n
Elektromagnetick\u00e1<\/td>\n~10-2<\/sup><\/td>\nNeomezen\u00fd<\/td>\nFoton<\/td>\nMezi nabit\u00fdmi \u010d\u00e1sticemi (nap\u0159. elektrony a protony)<\/td>\n<\/tr>\n
Slab\u00e1 jadern\u00e1<\/td>\n~10-6<\/sup><\/td>\n~10-18<\/sup> m<\/td>\nW\u00b1<\/sup>, Z0<\/sup> bosony<\/td>\nBeta rozpad a dal\u0161\u00ed p\u0159em\u011bny \u010d\u00e1stic<\/td>\n<\/tr>\n
Gravita\u010dn\u00ed<\/td>\n~10-39<\/sup> (nejmen\u0161\u00ed)<\/td>\nNeomezen\u00fd<\/td>\nGraviton (hypotetick\u00fd)<\/td>\nMezi v\u0161emi objekty s hmotnost\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

N\u00e1\u0161 vesm\u00edr je fascinuj\u00edc\u00edm m\u00edstem pln\u00fdm galaxi\u00ed, hv\u011bzd, planet a \u010d\u00e1stic, kter\u00e9 spolu neust\u00e1le interaguj\u00ed. V\u0161echny tyto interakce \u0159\u00edd\u00ed pouh\u00e9 \u010dty\u0159i z\u00e1kladn\u00ed s\u00edly p\u0159\u00edrody: gravitace, …. <\/p>\n","protected":false},"author":1,"featured_media":5417,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35,10,13],"tags":[53],"class_list":["post-5411","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sila","category-vesmir","category-zajimavosti","tag-gravitace"],"_links":{"self":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/5411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5411"}],"version-history":[{"count":2,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/5411\/revisions"}],"predecessor-version":[{"id":5872,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/5411\/revisions\/5872"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/media\/5417"}],"wp:attachment":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}