{"id":85115,"date":"2023-04-12T19:39:13","date_gmt":"2023-04-12T16:39:13","guid":{"rendered":"https:\/\/www.lovendal.ro\/wp52\/?p=85115"},"modified":"2023-04-12T19:39:13","modified_gmt":"2023-04-12T16:39:13","slug":"ar-putea-oamenii-sa-calatoreasca-cu-viteza-luminii-in-spatiul-cosmic","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/ar-putea-oamenii-sa-calatoreasca-cu-viteza-luminii-in-spatiul-cosmic\/","title":{"rendered":"Ar putea oamenii s\u0103 c\u0103l\u0103toreasc\u0103 cu viteza luminii \u00een spa\u0163iul cosmic?"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/viteza-mai-mare-viteza-luminii.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-85116\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/viteza-mai-mare-viteza-luminii.jpg\" alt=\"\" width=\"350\" height=\"290\" srcset=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/viteza-mai-mare-viteza-luminii.jpg 350w, https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2023\/04\/viteza-mai-mare-viteza-luminii-300x249.jpg 300w\" sizes=\"auto, (max-width: 350px) 100vw, 350px\" \/><\/a>Atunci c\u00e2nd vre\u0163i s\u0103 c\u0103l\u0103tori\u0163i o distan\u0163\u0103 mare, dintr-un continent \u00een altul, categoric o s\u0103 lua\u0163i avionul, pentru a zbura c\u00e2teva ore. Dar, dac\u0103 a\u0163i merge \u00een spa\u0163iul cosmic, trebuie s\u0103 c\u0103l\u0103tori\u0163i mult mai rapid, pentru c\u0103 distan\u0163ele sunt extrem de mari. Exploratorii spa\u0163iali au c\u0103utat \u00eentotdeauna o modalitate de a c\u0103l\u0103tori cel pu\u0163in la fel ca lumina, dac\u0103 nu mai rapid, pentru a le permite s\u0103 ajung\u0103 rapid \u00een Cosmos; teoretic, toate metodele inventate au numeroase dezavantaje, dar cercet\u0103ri \u00een domeniu tot se fac&#8230;<\/p>\n<p>Mai \u00eent\u00e2i, s\u0103 vorbim despre lumin\u0103. Lumina este fascinant\u0103 \u015fi foarte important\u0103 pentru via\u0163\u0103. Lumina are o vitez\u0103 de exact 299.792.458 m\/s sau aproximativ 300.000 km\/s. Dac\u0103 ve\u0163i aprinde un bec \u00eentr-o \u00eenc\u0103pere, aceasta se ilumineaz\u0103 instantaneu, pentru c\u0103 ea c\u0103l\u0103tore\u015fte extrem de repede.<\/p>\n<p>\u00cen astronomie, lumina este folosit\u0103 pentru a descrie o unitate astronomic\u0103 denumit\u0103 &#8222;an-lumin\u0103&#8221;, adic\u0103 distan\u0163a pe care lumina o poate parcurge pe parcursul unui an. Aceast\u0103 valoare este de aproximativ 10 trilioane de km. Aceasta este modalitatea pe care astronomii o folosesc pentru a m\u0103sura imensitatea Universului. Universul este at\u00e2t de vast, \u00eenc\u00e2t luminii i-ar trebui un timp imens pentru a c\u0103l\u0103tori dintr-un loc \u00een altul. S\u0103 lu\u0103m un exemplu: lumina de la Lun\u0103 la P\u0103m\u00e2nt ajunge \u00eentr-o secund\u0103. Totu\u015fi, lumina de la Soare are nevoie de 8 minute pentru a ajunge la noi. Lumina de la cea mai apropiat\u0103 stea, Proxima Centauri, are nevoie de circa 4,3 ani pentru a ajunge pe Terra. Alte corpuri cere\u015fti din afara sistemului nostru solar sunt situate la ani-lumin\u0103 sau chiar miliarde ani-lumin\u0103 fa\u0163\u0103 de noi. Asta \u00eenseamn\u0103 c\u0103 tot ceea ce observ\u0103 astronomii \u00een Univers reprezint\u0103 pur \u015fi simplu istorie.<\/p>\n<p>\u0162in\u00e2nd cont de toate aceste lucruri, cercet\u0103torii au \u00eencercat s\u0103 g\u0103seasc\u0103 o modalitate pentru a c\u0103l\u0103tori cu viteza luminii. Miliardarul Elon Musk vrea s\u0103 trimit\u0103 oameni pe Marte, dar pentru a ajunge acolo, cu tehnica actual\u0103 este nevoie de cel pu\u0163in 5 luni. Totu\u015fi, dac\u0103 s-ar putea c\u0103l\u0103tori pe Marte cu viteza luminii, ar fi nevoie de mai pu\u0163in de 4 minute! Dac\u0103 cercet\u0103torii ar reu\u015fi s\u0103 construiasc\u0103 vehicule care s\u0103 mearg\u0103 doar cu 1% din viteza luminii, s-ar putea ajunge de la San Francisco la New York (4.129 km) \u00eentr-o secund\u0103 \u015fi ceva.<\/p>\n<p>Marea problem\u0103 este dat\u0103 de energie; fiecare obiect movibil energie datorit\u0103 mi\u0219c\u0103rii sale, iar fizicienii numesc aceast\u0103 energie cinetic\u0103. Pentru a merge mai repede, trebuie crescut\u0103 energia cinetic\u0103. Problema este c\u0103 este nevoie de mult\u0103 energie cinetic\u0103 pentru a cre\u0219te viteza! Pentru a face ceva s\u0103 mearg\u0103 de 2 ori mai repede este nevoie de 4 ori mai mult\u0103 energie. Pentru a merge de 3 ori, este necesar\u0103 de 9 ori mai mult\u0103 energie, \u0219i a\u0219a mai departe. De exemplu, pentru a transporta un adolescent care c\u00e2nt\u0103re\u0219te 70 de kg la 1% din viteza luminii, ar fi nevoie de 200 de trilioane de jouli energie! Iar aceasta este aproximativ aceea\u0219i cantitate de energie pe care 2 milioane de oameni o folosesc \u00eentr-o zi.<\/p>\n<p>Deci, ce s-ar putea face pentru a dep\u0103\u015fi aceast\u0103 dificultate? \u00cen 2013, dar \u015fi \u00een 2014 am scris 2 articole despre faptul c\u0103 NASA lucreaz\u0103 la o nav\u0103 care ar putea c\u0103l\u0103tori cu o vitez\u0103 mai mare dec\u00e2t cea a luminii! S\u0103 citim articolul din 2013, intitulat <a href=\"https:\/\/www.lovendal.ro\/wp52\/nasa-lucreaza-la-o-nava-care-plasata-intr-un-nor-de-spatiu-timp-lipsit-de-masa-ar-putea-calatori-cu-o-viteza-mai-mare-decat-cea-a-luminii\/\" target=\"_blank\" rel=\"noopener\"><strong>NASA lucreaz\u0103 la o nav\u0103 care, plasat\u0103 \u00eentr-un \u201cnor de spa\u0163iu-timp\u201d, lipsit de mas\u0103, ar putea c\u0103l\u0103tori cu o vitez\u0103 mai mare dec\u00e2t cea a luminii!<\/strong><\/a>:<\/p>\n<p><em>NASA se pare c\u0103 lucreaz\u0103 \u00een prezent la primul test practic de cercetare a posibilit\u0103\u0163ii de a c\u0103l\u0103tori mai repede dec\u00e2t viteza luminii. C\u0103l\u0103toria cu o viteza mai mare dec\u00e2t cea a luminii (300.000 kms) a fost \u00eentotdeauna atribuit\u0103 science-fiction-ului, dar totul s-a schimbat atunci c\u00e2nd Harold White \u0219i echipa sa de la NASA a \u00eenceput s\u0103 lucreze la a\u015fa-zisul experiment al \u201cUnit\u0103\u0163ii Alcubierre\u201d. Solu\u021bia ar putea fi aceea de a amplasa o nav\u0103 \u00eentr-un spa\u021biu care se mi\u015fc\u0103 mai repede dec\u00e2t viteza luminii! Prin urmare, nava \u00een sine nu trebuie s\u0103 se deplaseze cu viteza luminii, de la propriul sistem de propulsie. <\/em><em>Fizicianul Miguel Alcubierre a fost primul care a identificat aceast\u0103 posibilitate. El a descris-o ca \u201co sta\u0163ionare a unei nave \u00een interiorul unei bule de spa\u0163iu-timp\u201d care e determinat\u0103 s\u0103 se mi\u015fte cu viteza mai mare dec\u00e2t cea a luminii. A nu se uita c\u0103 at\u00e2t spa\u0163iul, c\u00e2t \u015fi timpul pot fi (teoretic) deformate, distorsionate sau mutate.<\/em><\/p>\n<p>\u00cen 2014, scriam un alt articol pe aceast\u0103 tem\u0103 (<a href=\"https:\/\/www.lovendal.ro\/wp52\/nasa-ar-putea-sa-realizeze-unitati-alcubierre-cosmice-care-ne-ar-deplasa-la-viteze-mai-mari-decat-viteza-luminii-o-calatorie-pana-la-cea-mai-apropiata-stea-alpha-centauri-ar-dura-doar-doua-sap\/\" target=\"_blank\" rel=\"noopener\"><strong>NASA ar putea s\u0103 realizeze \u201cUnit\u0103\u0163i Alcubierre\u201d cosmice, care ne-ar deplasa la viteze mai mari dec\u00e2t viteza luminii! O c\u0103l\u0103torie p\u00e2n\u0103 la cea mai apropiat\u0103 stea, Alpha Centauri, ar dura doar dou\u0103 s\u0103pt\u0103m\u00e2ni!<\/strong><\/a>) \u00een care mai discutam despre c\u00e2t de mult avanseaz\u0103 aceast\u0103 idee.<\/p>\n<p>\u00centre timp, \u00een laborator, NASA \u015fi alte programe spa\u021biale lucreaz\u0103 la prototipul lui EmDrive, un propulsor rezonant, inventat de inginer aerospa\u021bial britanic Roger J. Shawyer. Acest dispozitiv de propulsie utilizeaz\u0103 un magnetron pentru a produce microunde pentru propulsie, nu are p\u0103r\u0163i \u00een mi\u015fcare \u015fi nu are nevoie de de combustibil. \u00cen 2014, Centrul Spa\u0163ial Johnson \u015fi-a dezvoltat propriul EmDrive.<\/p>\n<p>Un alt fizician, pe nume Lentz, \u0219i-a creat propria variant\u0103 pe care o crede mai viabil\u0103 pentru c\u0103 are r\u0103d\u0103cini \u00een fizica conven\u021bional\u0103. &#8222;Warp Drive&#8221;-ul lui Lentz este \u00eenc\u0103 complet teoretic, dar mai aproape de realitate, pentru c\u0103 include reducerea cantit\u0103\u021bii de energie necesar\u0103. \u0162inta sa este de a face o &#8222;bul\u0103 warp&#8221; capabil\u0103 s\u0103 se mi\u0219te la 1% din viteza luminii, folosind un reactor de fisiune modern.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Atunci c\u00e2nd vre\u0163i s\u0103 c\u0103l\u0103tori\u0163i o distan\u0163\u0103 mare, dintr-un continent \u00een altul, categoric o s\u0103 lua\u0163i avionul, pentru a zbura c\u00e2teva ore. Dar, dac\u0103 a\u0163i merge \u00een spa\u0163iul cosmic, trebuie s\u0103 c\u0103l\u0103tori\u0163i mult mai rapid, pentru c\u0103 distan\u0163ele sunt extrem &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Ar putea oamenii s\u0103 c\u0103l\u0103toreasc\u0103 cu viteza luminii \u00een spa\u0163iul cosmic?\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/ar-putea-oamenii-sa-calatoreasca-cu-viteza-luminii-in-spatiul-cosmic\/#more-85115\" aria-label=\"Cite\u0219te mai multe despre Ar putea oamenii s\u0103 c\u0103l\u0103toreasc\u0103 cu viteza luminii \u00een spa\u0163iul cosmic?\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":85116,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[7396,8773,9343,66,2048,4609,952,149,156,7208,150,525,105,4490,3102,3417,865,2501,3175,9803,789,1087,2916],"class_list":["post-85115","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stiinta","tag-astronomi","tag-elon-musk","tag-emdrive","tag-energie","tag-fizician","tag-inginer","tag-lumina","tag-luna","tag-marte","tag-miliardar","tag-nasa","tag-new-york","tag-pamant","tag-proxima-centauri","tag-san-francisco","tag-sistem-solar","tag-soare","tag-spatiu","tag-stele","tag-stiinta","tag-timp","tag-univers","tag-viteza-luminii","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ar putea oamenii s\u0103 c\u0103l\u0103toreasc\u0103 cu viteza luminii \u00een spa\u0163iul cosmic? - Secretele lui Lovendal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lovendal.ro\/wp52\/ar-putea-oamenii-sa-calatoreasca-cu-viteza-luminii-in-spatiul-cosmic\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ar putea oamenii s\u0103 c\u0103l\u0103toreasc\u0103 cu viteza luminii \u00een spa\u0163iul cosmic?\" \/>\n<meta property=\"og:description\" content=\"Atunci c\u00e2nd vre\u0163i s\u0103 c\u0103l\u0103tori\u0163i o distan\u0163\u0103 mare, dintr-un continent \u00een altul, categoric o s\u0103 lua\u0163i avionul, pentru a zbura c\u00e2teva ore. 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