{"id":3303,"date":"2010-06-07T18:09:20","date_gmt":"2010-06-07T15:09:20","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=3303"},"modified":"2010-06-25T14:56:38","modified_gmt":"2010-06-25T11:56:38","slug":"teadlased-valmistasid-kunstliku-musta-augu","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=3303","title":{"rendered":"Teadlased valmistasid kunstliku &#8216;musta augu&#8217;"},"content":{"rendered":"<p><strong>Hiina teadlased said edukalt hakkama elektromagnetilise mikrolaine sagedusi neelava seadme valmistamisega. Kuuek\u00fcmnest kontsentrilisest metamaterjalidest r\u00f5ngast koosnevast \u00f5hukesest silindrist valmistatud seade suudab neelata mikrolainekiirgust, seda on v\u00f5rreldud ka\u00a0astrof\u00fc\u00fcsikalise musta auguga.<\/strong><\/p>\n<p>Ajakirja <em>New Journal of Physics<\/em> 3. juuni v\u00e4ljaandes ilmuv artikkel n\u00e4itab, kuidas teadlased kasutasid \u00e4ra metamaterjalide erilisi omadusi. Metamaterjalid on komposiitmaterjalid, mis suudavad painutada valgust ning teisi laineid.<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<div id=\"attachment_3304\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2010\/06\/100603091829-large.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3304\" class=\"size-medium wp-image-3304\" title=\"100603091829-large\" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2010\/06\/100603091829-large-300x184.jpg\" alt=\"\" width=\"300\" height=\"184\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2010\/06\/100603091829-large-300x184.jpg 300w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2010\/06\/100603091829-large.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-3304\" class=\"wp-caption-text\">Igasuunaline elektromagnetiline kiirgusneeldur. Pilt: Institute of Physics <\/p><\/div>\n<p><strong>Quiang Cheng <\/strong>ning <strong>Tie Jun Cui Millimeeterlainete Laboratooriumist Nanjingi \u00dclikoolist Hiinast<\/strong> m\u00f5tlesid v\u00e4lja ning valmistasid neelava seadme, ametliku nimega ,,Igasuunaline elektromagnetiline kiirgusneelaja(omnidirectional electromagnetic absorber),&#8221; kasutades kuutek\u00fcmment elektriahela plaadi riba, mis vasega kaetult asetati kontsentriliste ringidena \u00fcksteise \u00fcmber. Igale kihile on prinditud isesugune muster, mis elektromagnetilistes lainetes kas resoneeruvad v\u00f5i mitte.<\/p>\n<p>Seade suudab kinni p\u00fc\u00fcda ning neelata 99%\u00a0igast suunast tulevatest elektromagnetilisistest lainetest, mis t\u00f5mmatakse spiraalina sisse ning mille energia muudetakse soojuseks. Seega k\u00e4itub see kui &#8216;elektromagnetiline must keha&#8217; v\u00f5i &#8216;elektromagnetiline must auk&#8217;.<\/p>\n<p>Hetkel t\u00f6\u00f6tab seade ainult mikrolainete puhul, kuid teadlastel on plaanis valmistada &#8216;must auk&#8217; ka n\u00e4htava valguse jaoks.<\/p>\n<p>Praeguste tulemustega oleks seadmel mikrolainete alal ka m\u00f5ningaid rakendusi. ,,Hea koosk\u00f5la teoreetiliste ja eksperimentaalsete tulemuste vahel n\u00e4itab h\u00e4sti, et metamaterjalid on tugevad kandidaadid kunstlike igasuunaliste kiirgusneelajate valmistamiseks,&#8221; kirjutasid teadlased.<\/p>\n<p>,,Kuna seadme kadudega tuum suudab muuta elektromagnetilist energiat soojusenergiaks, loodame, et seadet saab kasutada\u00a0t\u00e4htsates soojuskiirgusest ning elektromagnetilistest lainetest energia ammutamise rakendustes.&#8221;<\/p>\n<p><a href=\"http:\/\/www.sciencedaily.com\/releases\/2010\/06\/100603091829.htm\">Allikas<\/a><\/p>\n<p>Teadusartikkel &#8220;<a href=\"http:\/\/iopscience.iop.org\/1367-2630\/12\/6\/063006\">An omnidirectional electromagnetic absorber made of metamaterials<\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hiina teadlased said edukalt hakkama elektromagnetilise mikrolaine sagedusi neelava seadme valmistamisega. Kuuek\u00fcmnest kontsentrilisest metamaterjalidest r\u00f5ngast koosnevast \u00f5hukesest silindrist valmistatud seade suudab neelata mikrolainekiirgust, seda on v\u00f5rreldud ka\u00a0astrof\u00fc\u00fcsikalise musta auguga. Ajakirja New Journal of Physics 3. juuni v\u00e4ljaandes ilmuv artikkel n\u00e4itab, kuidas teadlased kasutasid \u00e4ra metamaterjalide erilisi omadusi. Metamaterjalid on komposiitmaterjalid, mis suudavad painutada valgust ning [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[31,16],"tags":[],"class_list":{"0":"post-3303","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rakenduslik-teadus","7":"category-teadusuudis","8":"entry","9":"has-post-thumbnail"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/3303","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3303"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/3303\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}