{"id":376193,"date":"2018-08-24T12:49:29","date_gmt":"2018-08-24T10:49:29","guid":{"rendered":"http:\/\/hudo.com\/si\/?p=376193"},"modified":"2018-08-24T12:49:29","modified_gmt":"2018-08-24T10:49:29","slug":"slovenskim-znanstvenikom-uspelo-razvozlati-150-let-staro-skrivnost-o-svetlobi","status":"publish","type":"post","link":"https:\/\/hudo.com\/si\/aktualno\/slovenskim-znanstvenikom-uspelo-razvozlati-150-let-staro-skrivnost-o-svetlobi\/","title":{"rendered":"Slovenskim znanstvenikom uspelo razvozlati 150 let staro skrivnost o svetlobi"},"content":{"rendered":"

Kot pi\u0161e na spletni strani univerze v kanadski Britanski Kolumbiji, so v okviru poskusa laserski \u017earek odbili od majhnega zrcalca, pri \u010demer se je svetloba odbila in povzro\u010dila elasti\u010dne valove, podobne tistim, ki jih spro\u017ei potres na Zemlji. Svetlobni elasti\u010dni valovi so sicer precej manj\u0161i.<\/p>\n

S tem so \u017eeleli ugotoviti, kako svetloba s svojo gibalno koli\u010dino vpliva na dolo\u010deno snov. Pri gibalni koli\u010dini gre za fizikalno koli\u010dino, ki povzro\u010da gibanje. Svetloba tako povzro\u010da gibanje, \u010deprav nima mase.<\/p>\n

Nem\u0161ki astronom Johannes Kepler je \u017ee v 17. stoletju ugotovil, da je rep kometa obrnjen stran od Sonca, kar pomeni, da Sonce ustvarja dolo\u010den pritisk. O tem, da ima svetloba gibalno koli\u010dino, so prvi\u010d teoreti\u010dno razmi\u0161ljali leta 1873, prvi\u010d pa so jo izmerili leta 1900, vendar zgolj kako se kot celota prenese na telo.<\/p>\n

Slovenski, kanadski in brazilski znanstveniki pa so zdaj po skoraj 150 letih ugotovili, kako se gibalna koli\u010dina prenese na snov v \u010dasu in prostoru in da se pri tem spro\u017eijo elasti\u010dni valovi.<\/p>\n

V okviru raziskave, ki jo je vodil Toma\u017e Po\u017ear z ljubljanske fakultete za strojni\u0161tvo, so slovenski raziskovalci opravili meritve, ekipa iz Kanade pa je izra\u010dunala opti\u010dne sile. Brazilski znanstveniki so nato naredili natan\u010den model \u0161irjenja valovanja.<\/p>\n

Te ugotovitve bi lahko uporabili za delovanje opti\u010dnih pincet, ki jih znanstveniki uporabljajo za natan\u010dno premikanje in dr\u017eanje majhnih delcev. Te pincete, ki imajo laserski snop, zaenkrat dobro delujejo predvsem pri ugotavljanju vpliva svetlobe na toge snovi, za katere je zna\u010dilno, da se gibljejo kot celota.<\/p>\n

Za opazovanje deformabilnih snovi, torej tistih, pri katerih lahko nastanejo deformacije, pa \u0161e nimajo ustrezne teorije. Znanstveniki so zdaj postavili neke vrste osnovo, kako priti do kon\u010dnega opisa vpliva svetlobe na te snovi. Primer deformabilne snovi je organska celica, ki se ne giblje zgolj kot celota, ampak se tudi zvija.<\/p>\n

Dostop do originalnega znanstvenega \u010dlanka, objavljenega v znanstveni reviji Nature Communications,:\u00a0https:\/\/www.nature.com\/articles\/s41467-018-05706-3<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Slovenski znanstveniki so v sodelovanju s kanadskimi in brazilskimi kolegi razvozlali 150 let staro skrivnost o tem, kako svetloba povzro\u010da gibanje snovi. Ugotovili so, da to po\u010dne prek elasti\u010dnih valov, podobnih potresnim.<\/p>\n","protected":false},"author":8,"featured_media":376195,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1179],"tags":[1595,11812,1398],"source":[4511],"supertag":[],"acf":[],"yoast_head":"\nSlovenskim znanstvenikom uspelo razvozlati 150 let staro skrivnost o svetlobi - Hudo Slovenija<\/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:\/\/hudo.com\/si\/aktualno\/slovenskim-znanstvenikom-uspelo-razvozlati-150-let-staro-skrivnost-o-svetlobi\/\" \/>\n<meta property=\"og:locale\" content=\"sl_SI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Slovenskim znanstvenikom uspelo razvozlati 150 let staro skrivnost o svetlobi - Hudo Slovenija\" \/>\n<meta property=\"og:description\" content=\"Slovenski znanstveniki so v sodelovanju s kanadskimi in brazilskimi kolegi razvozlali 150 let staro skrivnost o tem, kako svetloba povzro\u010da gibanje snovi. 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