{"id":287,"date":"2014-04-07T07:30:04","date_gmt":"2014-04-07T05:30:04","guid":{"rendered":"http:\/\/www.argia.eus\/blogak\/ibon-larrazabal\/?p=287"},"modified":"2014-04-07T07:30:04","modified_gmt":"2014-04-07T05:30:04","slug":"eguzkia-lege-unibertsalak-hausten","status":"publish","type":"post","link":"https:\/\/blogak.argia.eus\/ibon-larrazabal\/2014\/04\/07\/eguzkia-lege-unibertsalak-hausten\/","title":{"rendered":"Eguzkia lege unibertsalak hausten"},"content":{"rendered":"

 <\/p>\n

\"Eguzki<\/a>

Eguzki azala<\/p><\/div>\n

Txikitandik gure intuizioak edo eguneroko esperientziak fisikaren lege bat irakasten digu: beroak, beti, beroago dagoen objektutik hotzago dagoen objekturantz bidaiatzen duela. Horrela ikasten dugu, adibidez, hotz bagara sute batera hurbilduz berotuko garela eta, aldi berean, gehiegi hurbilduz gero erreko garela. Zientzialariak gero etorriko dira intuizio horri lege fisiko baten itxura ematera, hizkera zientifikoan eta unibertso guztirako baliagarriak diren hitz eta esamoldeetan. Kasu honetan, hori da Termodinamikaren Bigarren Legeak esaten duena.<\/span><\/p>\n

Termodinamikaren Bigarren Lege horrek dioena (eta guk gure hitzetan antzematen duguna) hitzez hitz betetzen da ezaguna zaigun unibertso osoan, leku jakin batean izan ezik: eguzkian.<\/span><\/p>\n

Eguzkiaren azalak, kromosfera bezala ere ezaguna denak, 5.500 Celsius graduko tenperatura dauka, baina hura inguratzen duen ehunka kilometroko geruzak, eguzki koroak, ostera milioi bat Celsius graduko tenperatura dauka! Berrehun bat bider beroago dago eguzki koroa eguzki azala baino! Hots, beroak eguzkiaren azala uzten duenean Termodinamikaren Bigarren Legea hausten da: lege honek (eta gure intuizioak) esaten dutenez, bietatik beroena beroa isurtzen duena izan beharko litzateke (eguzki azala), eta ez beroa hartzen duena (eguzki koroa). Grafikoki azaltzeko, eguzki koroan gertatzen dena, piztutako bonbilla baten inguruko airea bonbillaren beira baino beroago balego bezalako zerbait litzateke.<\/span><\/p>\n

Eta nola gerta daiteke horrelako zerbait? Laburbilduz, ez dakigu. Fenomenoa aurkitu zenetik, 1.939an, zientzialariek teoria ezberdinak landu dituzte, baina, egun, batek ere ez du fenomeno hau behin betiko eta erabat azaldu. Proposatutako teorietatik bi dira modu orokorrago batean defendatuak izan direnak: uhin berokuntza eta berkonekzio magnetikoa.<\/span><\/p>\n

NASAren misio bat, Solar Probe 9 izenekoa, eguzkiaren 9,5 erradioko distantziara hurbiltzeko proiektua martxan dago, koroako beroaren eta beste fenomeno batzuen ikerketarako datuak lortzeko asmoz.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

  Txikitandik gure intuizioak edo eguneroko esperientziak fisikaren lege bat irakasten digu: beroak, beti, beroago dagoen objektutik hotzago dagoen objekturantz bidaiatzen duela. Horrela ikasten dugu, adibidez, hotz bagara sute batera hurbilduz berotuko garela eta, aldi berean, gehiegi hurbilduz gero erreko garela. Zientzialariak gero etorriko dira intuizio horri lege fisiko baten itxura ematera, hizkera zientifikoan eta […]<\/p>\n","protected":false},"author":80,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,6,10],"tags":[],"class_list":["post-287","post","type-post","status-publish","format-standard","hentry","category-azalpenik-gabekoak","category-naturaren-bitxikeriak","category-zientzia-bitxia"],"yoast_head":"\nEguzkia lege unibertsalak hausten - Liber Prodigiorum<\/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:\/\/blogak.argia.eus\/ibon-larrazabal\/2014\/04\/07\/eguzkia-lege-unibertsalak-hausten\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Eguzkia lege unibertsalak hausten - Liber Prodigiorum\" \/>\n<meta property=\"og:description\" content=\"  Txikitandik gure intuizioak edo eguneroko esperientziak fisikaren lege bat irakasten digu: beroak, beti, beroago dagoen objektutik hotzago dagoen objekturantz bidaiatzen duela. 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