{"version":"1.0","provider_name":"Astro-novinky.eu","provider_url":"https:\/\/www.astro-novinky.eu","title":"Video: Pozoruhodn\u00e9 blesky - Astro-novinky.eu","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"C360PcB3Q8\"><a href=\"https:\/\/www.astro-novinky.eu\/index.php\/2025\/07\/15\/video-pozoruhodne-blesky\/\">Video: Pozoruhodn\u00e9 blesky<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.astro-novinky.eu\/index.php\/2025\/07\/15\/video-pozoruhodne-blesky\/embed\/#?secret=C360PcB3Q8\" width=\"600\" height=\"338\" title=\"&#8220;Video: Pozoruhodn\u00e9 blesky&#8221; &#8212; Astro-novinky.eu\" data-secret=\"C360PcB3Q8\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.astro-novinky.eu\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2025\/07\/2012_07_03_Boure_Ondrejov_Hv_1_s2_startrails_cut-kopie.jpg","thumbnail_width":1500,"thumbnail_height":946,"description":"Bou\u0159ka je impozantn\u00ed p\u0159\u00edrodn\u00ed \u00fakaz. Vznik\u00e1 a rozv\u00edj\u00ed se ve spojitosti se specifick\u00fdm druhem oblaku, cumulonimbem. V\u00a0jin\u00fdch oblac\u00edch nevznik\u00e1. Cumulonimbus je oblak kumuliformn\u00edho typu s\u00a0velk\u00fdm vertik\u00e1ln\u00edm rozsahem. V\u00a0na\u0161ich zem\u011bpisn\u00fdch \u0161\u00ed\u0159k\u00e1ch m\u00edv\u00e1 z\u00e1kladnu kolem 1 a\u017e 2 kilometr\u016f nad zem\u00ed, vrcholy v\u00a0letn\u00edm obdob\u00ed kolem 12 a\u017e 15 kilometr\u016f, co\u017e je d\u00e1no v\u00fd\u0161kou tropopauzy a mo\u017enost\u00ed pr\u016fniku konvektivn\u00edho proudu do spodn\u00ed stratosf\u00e9ry. V\u00a0rovn\u00edkov\u00fdch oblastech sahaj\u00ed bou\u0159kov\u00e9 oblaky do je\u0161t\u011b v\u011bt\u0161\u00edch v\u00fd\u0161ek. A pr\u00e1v\u011b vertik\u00e1ln\u00ed rozsah oblaku je pro n\u00e1sledn\u00fd vznik blesk\u016f d\u016fle\u017eit\u00fd. Jsou v\u0161ak i jin\u00e9 druhy oblak\u016f, kter\u00e9 maj\u00ed velk\u00fd vertik\u00e1ln\u00ed rozsah, jako je nap\u0159\u00edklad nimbostratus, a p\u0159esto v\u00a0nich k\u00a0elektrick\u00fdm v\u00fdboj\u016fm nedoch\u00e1z\u00ed. Bou\u0159kov\u00fd cumulonimbus je oproti jin\u00fdm oblak\u016fm typick\u00fd zna\u010dn\u00fdmi vertik\u00e1ln\u00edm rychlostmi proud\u011bn\u00ed, kter\u00e9 p\u0159en\u00e1\u0161ej\u00ed hmotu vody, p\u0159\u00edpadn\u011b ledu, rychle nahoru a dol\u016f, a spolu s\u00a0vodn\u00edmi nebo ledov\u00fdmi \u010d\u00e1sticemi se p\u0159en\u00e1\u0161\u00ed tak\u00e9 elektrick\u00fd n\u00e1boj, kter\u00fd je pokr\u00fdv\u00e1. Vznik\u00e1 tak polarizovan\u00e9 elektrick\u00e9 pole, kter\u00e9 p\u0159i dostate\u010dn\u00e9 intenzit\u011b vede k\u00a0v\u00fdboji."}