{"id":19305,"date":"2026-05-08T11:38:00","date_gmt":"2026-05-08T09:38:00","guid":{"rendered":"https:\/\/www.medskvz.org\/web\/?p=19305"},"modified":"2026-07-16T11:42:07","modified_gmt":"2026-07-16T09:42:07","slug":"suncanje-i-zracenje-nasi-ucenici-geigerovim-brojacem-mjerili-radioaktivnost-u-hladu-i-na-suncu","status":"publish","type":"post","link":"https:\/\/www.medskvz.org\/web\/2026\/05\/suncanje-i-zracenje-nasi-ucenici-geigerovim-brojacem-mjerili-radioaktivnost-u-hladu-i-na-suncu\/","title":{"rendered":"<strong>Sun\u010danje i zra\u010denje<br>&#8211; Na\u0161i u\u010denici Geigerovim broja\u010dem mjerili radioaktivnost u hladu i na suncu<\/strong>"},"content":{"rendered":"<p>U sklopu \u0161este klju\u010dne aktivnosti na\u0161eg interdisciplinarnog projekta \u201eZdrav okoli\u0161 za zdrav \u017eivot!\u201d, tim u\u010denika posvetio se rje\u0161avanju jedne vrlo \u010deste dileme: mijenja li se razina prirodnog ioniziraju\u0107eg zra\u010denja kada se nalazimo izravno na suncu u usporedbi s boravkom u hladu. Budu\u0107i da prirodno pozadinsko zra\u010denje \u010dini \u010dak osamdeset posto ukupne godi\u0161nje doze koju primi prosje\u010dan \u010dovjek, a dolazi iz svemirskih dubina kao kozmi\u010dko zra\u010denje te iz samog tla i stijena kao terestrijalno zra\u010denje, razumijevanje njegove dinamike na otvorenome prostoru klju\u010dno je za procjenu svakodnevne sigurnosti. Kako bi proveli ovaj zanimljiv pokus, u\u010denici su iza\u0161li u \u0161kolsko dvori\u0161te te pomo\u0107u naprednog Geiger-M\u00fcllerovog broja\u010da mjerili razli\u010dite kombinacije zra\u010denja na precizno odre\u0111enim udaljenostima od tri, dva i jednog metra od tla, odvojeno provode\u0107i cijeli protokol u dubokom hladu i na izravnom sun\u010devom svjetlu.<\/p>\n<p>Mjerenja su obuhvatila pra\u0107enje ukupnog alfa, beta i gama zra\u010denja, kao i odvojena mjerenja samog gama zra\u010denja te kombinacije beta i gama \u010destica. Dobiveni tabli\u010dni rezultati ponudili su iznimno pou\u010dne znanstvene spoznaje i otklonili uobi\u010dajene zablude. Pokazalo se da su razine ioniziraju\u0107eg zra\u010denja u hladu i na suncu vrlo sli\u010dne te da nema nikakvih dramati\u010dnih odstupanja ovisno o tome obasjava li nas Sunce ili se skrivamo u sjeni. Primjerice, ukupno zra\u010denje na udaljenosti od tri metra u hladu iznosilo je 0,140 mikrosiverta po satu, dok je na suncu na istoj udaljenosti zabilje\u017eeno 0,103 mikrosiverta po satu. Sli\u010dna ujedna\u010denost uo\u010dena je i kod \u010distog gama zra\u010denja koje je na udaljenosti od jednog metra u oba slu\u010daja iznosilo identi\u010dnih 0,090 mikrosiverta po satu, \u0161to potvr\u0111uje stabilnost prirodne pozadinske mikroklime.<\/p>\n<p>Glavni zaklju\u010dak ovog u\u010deni\u010dkog istra\u017eivanja jasno umiruje javnost jer pokazuje da sve izmjerene vrijednosti odgovaraju uobi\u010dajenoj, niskoj pozadinskoj razini zra\u010denja i ne predstavljaju nikakav zdravstveni rizik za ljude u svakodnevnom okru\u017eenju. Iako Sun\u010deva svjetlost donosi toplinu i ultraljubi\u010dasto zra\u010denje, ona sama po sebi ne poja\u010dava opasno ioniziraju\u0107e zra\u010denje na povr\u0161ini Zemlje jer nas na\u0161a atmosfera uspje\u0161no \u0161titi poput \u0161tita. Na\u0161i mladi istra\u017eiva\u010di podsje\u0107aju da je prirodno zra\u010denje stalni dio na\u0161eg planeta te da je ljudski organizam kroz evoluciju potpuno prilago\u0111en ovim malim, sigurnim koli\u010dinama, \u0161to nam omogu\u0107uje bezbri\u017ean boravak na otvorenom i svje\u017eem zraku.<\/p>\n<p>mag. educ. math. et phys. Ines Ko\u0161\u0107ak<\/p>\n<p>mag. educ. math. et phys. Elizabeta \u0160imunovi\u0107, profesor mentor<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 33%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-19305 gallery-columns-3 gallery-size-large'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/3-1.jpg'><img width=\"664\" height=\"885\" src=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/3-1.jpg\" class=\"attachment-large size-large colorbox-19305 \" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/3-1.jpg 664w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/3-1-225x300.jpg 225w\" sizes=\"(max-width: 664px) 100vw, 664px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/1-1-scaled.jpg'><img width=\"768\" height=\"1024\" src=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/1-1-768x1024.jpg\" class=\"attachment-large size-large colorbox-19305 \" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/1-1-768x1024.jpg 768w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/1-1-225x300.jpg 225w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/1-1-1152x1536.jpg 1152w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/1-1-1536x2048.jpg 1536w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/1-1-scaled.jpg 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/2-1-scaled.jpg'><img width=\"768\" height=\"1024\" src=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/2-1-768x1024.jpg\" class=\"attachment-large size-large colorbox-19305 \" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/2-1-768x1024.jpg 768w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/2-1-225x300.jpg 225w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/2-1-1152x1536.jpg 1152w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/2-1-1536x2048.jpg 1536w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/2-1-scaled.jpg 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<p>08<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"slide-text-bg2\"><span>U sklopu \u0161este klju\u010dne aktivnosti na\u0161eg interdisciplinarnog projekta \u201eZdrav okoli\u0161 za zdrav \u017eivot!\u201d, tim u\u010denika posvetio se rje\u0161avanju jedne vr<\/span><\/div>\n<div class=\"slide-btn-area-sm\"><a href=\"https:\/\/www.medskvz.org\/web\/2026\/05\/suncanje-i-zracenje-nasi-ucenici-geigerovim-brojacem-mjerili-radioaktivnost-u-hladu-i-na-suncu\/\" class=\"slide-btn-sm\">Pro\u010ditaj vi\u0161e<\/a><\/div>\n","protected":false},"author":11,"featured_media":19272,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts\/19305"}],"collection":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/comments?post=19305"}],"version-history":[{"count":1,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts\/19305\/revisions"}],"predecessor-version":[{"id":19313,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts\/19305\/revisions\/19313"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/media\/19272"}],"wp:attachment":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/media?parent=19305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/categories?post=19305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/tags?post=19305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}