{"id":6213,"date":"2019-02-16T04:42:49","date_gmt":"2019-02-15T23:12:49","guid":{"rendered":"http:\/\/astan.lk\/al_virtualclassroom\/?p=6213"},"modified":"2019-02-16T09:02:21","modified_gmt":"2019-02-16T03:32:21","slug":"%e0%ae%aa%e0%ae%b0%e0%ae%aa%e0%af%8d%e0%ae%aa%e0%af%81-%e0%ae%87%e0%ae%b4%e0%af%81%e0%ae%b5%e0%af%88","status":"publish","type":"post","link":"https:\/\/astan.lk\/al_virtualclassroom\/ta\/%e0%ae%aa%e0%ae%b0%e0%ae%aa%e0%af%8d%e0%ae%aa%e0%af%81-%e0%ae%87%e0%ae%b4%e0%af%81%e0%ae%b5%e0%af%88\/","title":{"rendered":"\u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bc1 \u0b87\u0bb4\u0bc1\u0bb5\u0bc8"},"content":{"rendered":"<p><strong>\u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 (\u03c3)<\/strong><\/p>\n<ul>\n<li>\u0b92\u0bb0\u0bc1 \u0b9a\u0ba4\u0bc1\u0bb0 \u0b85\u0bb2\u0b95\u0bc1 \u0b95\u0bc1\u0bb1\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bb5\u0bc6\u0b9f\u0bcd\u0b9f\u0bc1\u0baa\u0bcd \u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bbf\u0bb2\u0bcd \u0ba4\u0bbe\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0bb5\u0bbf\u0b9a\u0bc8 \u0b86\u0b95\u0bc1\u0bae\u0bcd.<\/li>\n<li><\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"http:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Csigma%20%3D%20%5Cfrac%7BF%7D%7BA%7D\" alt=\"\\sigma = \\frac{F}{A}\" align=\"absmiddle\" \/><\/p>\n<ul>\n<li>\u0b85\u0bb2\u0b95\u0bc1 &#8211; Nm<sup>-2<\/sup> \u0b86\u0b95\u0bc1\u0bae\u0bcd.<\/li>\n<\/ul>\n<p><strong>\u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd (\u03b5)<\/strong><br \/>\n\u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1\u0bb1\u0bcd\u0bb1\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0b92\u0bb0\u0bc1 \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bbf\u0ba9\u0bcd \u0baa\u0bb0\u0bc1\u0bae\u0ba9\u0bbf\u0bb2\u0bcd \u0b85\u0bb2\u0bcd\u0bb2\u0ba4\u0bc1 \u0bb5\u0b9f\u0bbf\u0bb5\u0bbf\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0baa\u0bbf\u0ba9\u0bcd\u0ba9\u0bae\u0bbe\u0bb1\u0bcd\u0bb1\u0bae\u0bcd \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0b8e\u0ba9\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd. \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0baa\u0bb0\u0bbf\u0bae\u0bbe\u0ba9\u0bae\u0bcd \u0b85\u0bb2\u0b95\u0bb1\u0bcd\u0bb1\u0ba4\u0bc1.<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"http:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Cvarepsilon%3D%5Cfrac%7Be%7D%7Bl%7D\" alt=\"\\varepsilon=\\frac{e}{l}\" align=\"absmiddle\" \/><\/p>\n<p><strong>\u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1<\/strong><br \/>\n\u0b87\u0bb4\u0bc1\u0bb5\u0bbf\u0b9a\u0bc8\u0b95\u0bcd\u0b95\u0bc1 \u0b89\u0b9f\u0bcd\u0baa\u0b9f\u0bcd\u0b9f\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bca\u0ba9\u0bcd\u0bb1\u0bbf\u0ba9\u0bcd \u0b92\u0bb0\u0bc1 \u0b9a\u0ba4\u0bc1\u0bb0 \u0b85\u0bb2\u0b95\u0bc1 \u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bc1\u0b95\u0bcd\u0b95\u0bc1 \u0b9a\u0bc6\u0b99\u0bcd\u0b95\u0bc1\u0ba4\u0bcd\u0ba4\u0bbe\u0b95 \u0ba4\u0bbe\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd\u0bb5\u0bbf\u0b9a\u0bc8 \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b8e\u0ba9\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd.<\/p>\n<p><strong>\u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd<\/strong><br \/>\n\u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1\u0bb1\u0bcd\u0bb1\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0b87\u0bb4\u0bc8\u0baf\u0bca\u0ba9\u0bcd\u0bb1\u0bbf\u0ba9\u0bcd \u0b93\u0bb0\u0bb2\u0b95\u0bc1 \u0ba8\u0bc0\u0bb3\u0ba4\u0bcd\u0ba4\u0bbf\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0ba8\u0bc0\u0b9f\u0bcd\u0b9a\u0bbf \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0b8e\u0ba9\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd.<\/p>\n<p><img decoding=\"async\" class=\"mathtex-equation-editor\" src=\"http:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Cvarepsilon%3D%5Cfrac%7Be%7D%7Bl%7D\" alt=\"\\varepsilon=\\frac{e}{l}\" align=\"absmiddle\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u0bb5\u0bbf\u0b95\u0bbf\u0ba4\u0b9a\u0bae \u0b8e\u0bb2\u0bcd\u0bb2\u0bc8<\/strong><br \/>\n\u0bae\u0bc0\u0bb3\u0bbf\u0baf\u0bb2\u0bcd \u0b87\u0bb4\u0bc8\u0baf\u0bbf\u0bb2\u0bcd \u0ba8\u0bc0\u0b9f\u0bcd\u0b9a\u0bbf\u0b95\u0bcd\u0b95\u0bc1 \u0bb5\u0bbf\u0b95\u0bbf\u0ba4\u0b9a\u0bae\u0ba9\u0bbe\u0b95 \u0bb5\u0bbf\u0b9a\u0bc8 \u0b85\u0bae\u0bc8\u0baf\u0b95\u0bcd \u0b95\u0bc2\u0b9f\u0bbf\u0baf\u0bb5\u0bbe\u0bb1\u0bc1 \u0b87\u0bb4\u0bc8\u0baf\u0bbf\u0bb2\u0bcd \u0baa\u0bbf\u0bb0\u0baf\u0bcb\u0b95\u0bbf\u0b95\u0bcd\u0b95\u0b95\u0bcd\u0b95\u0bc2\u0b9f\u0bbf\u0baf \u0b89\u0baf\u0bb0\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b86\u0b95\u0bc1\u0bae\u0bcd.<br \/>\n<strong>\u0bae\u0bc0\u0bb3\u0bbf\u0baf\u0bb2\u0bcd \u0b8e\u0bb2\u0bcd\u0bb2\u0bc8<\/strong><br \/>\n\u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1\u0bb1\u0bcd\u0bb1\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bbf\u0bb2\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b85\u0b95\u0bb1\u0bcd\u0bb1\u0baa\u0bcd\u0baa\u0b9f\u0bcd\u0b9f\u0ba4\u0bc1\u0bae\u0bcd \u0bae\u0bc0\u0ba3\u0bcd\u0b9f\u0bc1\u0bae\u0bcd \u0baa\u0bb4\u0bc8\u0baf\u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bc8 \u0b85\u0b9f\u0bc8\u0baf\u0b95\u0bcd\u0b95\u0bc2\u0b9f\u0bbf\u0baf\u0bb5\u0bbe\u0bb1\u0bc1 \u0b87\u0bb4\u0bc8\u0baf\u0bbf\u0bb2\u0bcd \u0baa\u0bbf\u0bb0\u0baf\u0bcb\u0b95\u0bbf\u0b95\u0bcd\u0b95\u0ba4\u0b95\u0bcd\u0b95 \u0b89\u0baf\u0bb0\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b86\u0b95\u0bc1\u0bae\u0bcd.<br \/>\n<strong>\u0b8a\u0b95\u0bcd\u0b95\u0bbf\u0ba9\u0bcd \u0bb5\u0bbf\u0ba4\u0bbf<\/strong><br \/>\n\u0bb5\u0bbf\u0b95\u0bbf\u0ba4\u0b9a\u0bae \u0b8e\u0bb2\u0bcd\u0bb2\u0bc8\u0b95\u0bcd\u0b95\u0bc1\u0b9f\u0bcd\u0baa\u0b9f\u0bcd\u0b9f \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bbf\u0bb2\u0bcd \u0b87\u0bb4\u0bc8 \u0b85\u0bb2\u0bcd\u0bb2\u0ba4\u0bc1 \u0b9a\u0bc1\u0bb0\u0bc1\u0bb3\u0bbf\u0bb5\u0bbf\u0bb2\u0bcd \u0b92\u0ba9\u0bcd\u0bb1\u0bbf\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0ba8\u0bc0\u0b9f\u0bcd\u0b9a\u0bbf\u0baf\u0bbe\u0ba9\u0ba4\u0bc1 \u0b85\u0ba4\u0bbf\u0bb2\u0bcd \u0baa\u0bbf\u0bb0\u0baf\u0bcb\u0b95\u0bbf\u0b95\u0bcd\u0b95\u0baa\u0bcd \u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0b9a\u0bc1\u0bae\u0bc8\u0b95\u0bcd\u0b95\u0bc1 \u0ba8\u0bc7\u0bb0\u0bcd\u0bb5\u0bbf\u0b95\u0bbf\u0ba4 \u0b9a\u0bae\u0ba9\u0bbe\u0b95\u0bc1\u0bae\u0bcd.<\/p>\n<p>F\u00a0\u221e e<\/p>\n<p>F = ke<br \/>\n<strong>\u0b87\u0bb1\u0bc1\u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \/ \u0b87\u0bb1\u0bc1\u0baa\u0bc1\u0bb3\u0bcd\u0bb3\u0bbf<\/strong><\/p>\n<p>\u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bca\u0ba9\u0bcd\u0bb1\u0bc1 \u0b89\u0b9f\u0bc8\u0baf\u0bbe\u0ba4\u0bb5\u0bbe\u0bb1\u0bc1 \u0b87\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0ba4\u0bcd\u0ba4\u0b95\u0bcd\u0b95\u0bb5\u0bbe\u0bb1\u0bc1 \u0b85\u0ba4\u0ba9\u0bbf\u0bb2\u0bcd \u0baa\u0bbf\u0bb0\u0baf\u0bcb\u0b95\u0bbf\u0b95\u0bcd\u0b95\u0baa\u0bcd\u0baa\u0b9f\u0b95\u0bcd \u0b95\u0bc2\u0b9f\u0bbf\u0baf \u0bb5\u0bbf\u0b9a\u0bc8\u0baf\u0bbf\u0ba9\u0bbe\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0b89\u0baf\u0bb0\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bbf\u0ba9\u0bcd \u0b87\u0bb1\u0bc1\u0baa\u0bc1\u0bb3\u0bcd\u0bb3\u0bbf \u0b85\u0bb2\u0bcd\u0bb2\u0ba4\u0bc1 \u0b87\u0bb1\u0bc1\u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b86\u0b95\u0bc1\u0bae\u0bcd.<br \/>\n<strong>\u0baf\u0b99\u0bcd\u0b95\u0bbf\u0ba9\u0bcd\u0bae\u0b9f\u0bcd\u0b9f\u0bc1<\/strong><br \/>\n\u0bb5\u0bbf\u0b95\u0bbf\u0ba4\u0b9a\u0bae \u0b8e\u0bb2\u0bcd\u0bb2\u0bc8\u0b95\u0bcd\u0b95\u0bc1\u0b9f\u0bcd\u0baa\u0b9f\u0bcd\u0b9f \u0ba8\u0bbf\u0bb2\u0bc8\u0baf\u0bbf\u0bb2\u0bcd \u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bbf\u0bb1\u0bcd\u0b95\u0bc1\u0bae\u0bcd. \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0ba4\u0bcd\u0ba4\u0bbf\u0bb1\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0b87\u0b9f\u0bc8\u0baf\u0bc7\u0baf\u0bbe\u0ba9 \u0bb5\u0bbf\u0b95\u0bbf\u0ba4\u0bae\u0bcd \u0baf\u0b99\u0bcd\u0b95\u0bbf\u0ba9\u0bcd\u0bae\u0b9f\u0bcd\u0b9f\u0bc1 \u0b86\u0b95\u0bc1\u0bae\u0bcd.<br \/>\n\u0baf\u0b99\u0bcd\u0b95\u0bbf\u0ba9\u0bcd \u0bae\u0b9f\u0bcd\u0b9f\u0bc1 = \u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \/ \u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd<\/p>\n<p>E =( F\/A) \/ (\u00a0e\/l)<br \/>\nE = Fl\/Ae<\/p>\n<p>\u0b85\u0bb2\u0b95\u0bc1-Pa.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u0b88\u0bb0\u0bcd\u0b95\u0bcd\u0b95\u0baa\u0bcd\u0baa\u0b9f\u0bcd\u0b9f \u0b87\u0bb4\u0bc8\u0baf\u0bbf\u0bb2\u0bcd \u0b9a\u0bc7\u0bae\u0bbf\u0b95\u0bcd\u0b95\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0b9a\u0bcd \u0b9a\u0b95\u0bcd\u0ba4\u0bbf<\/strong><br \/>\n\u0b95\u0bae\u0bcd\u0baa\u0bbf \u0ba8\u0bc0\u0b9f\u0bcd\u0b9a\u0bbf\u0baf\u0b9f\u0bc8\u0baf\u0bc1\u0bae\u0bcd \u0baa\u0bcb\u0ba4\u0bbe\u0ba9 \u0b87\u0b9f\u0bc8\u0bb5\u0bbf\u0b9a\u0bc8=<\/p>\n<p>\u0b9a\u0bc6\u0baf\u0bcd\u0baf\u0baa\u0bcd\u0baa\u0b9f\u0bcd\u0b9f \u0bb5\u0bc7\u0bb2\u0bc8 = \u0b87\u0b9f\u0bc8\u0bb5\u0bbf\u0b9a\u0bc8 *\u0ba4\u0bc2\u0bb0\u0bae\u0bcd<br \/>\n\u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0b9a\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf w= \u00a0\u00bd ke<br \/>\n\u0b8a\u0b95\u0bcd\u0b95\u0bbf\u0ba9\u0bcd \u0bb5\u0bbf\u0ba4\u0bbf\u0baa\u0bcd\u0baa\u0b9f\u0bbf F =ke<br \/>\n\u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0b9a\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf w=\u00a0\u00a0\u00bd ke<sup>2<\/sup><br \/>\n\u0baf\u0b99\u0bcd\u0b95\u0bbf\u0ba9\u0bcd \u0bae\u0b9f\u0bcd\u0b9f\u0bbf\u0bb2\u0bbf\u0bb0\u0bc1\u0ba8\u0bcd\u0ba4\u0bc1<br \/>\n\u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0b9a\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf =\u00bd= EAe<sup>2<\/sup><\/p>\n<p>Al \u0b95\u0ba9\u0bb5\u0bb3\u0bb5\u0bbf\u0bb2\u0bcd \u0b9a\u0bc7\u0bae\u0bbf\u0b95\u0bcd\u0b95\u0baa\u0bcd\u0baa\u0b9f\u0bcd\u0b9f \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0b9a\u0bcd\u0b9a\u0b95\u0bcd\u0ba4\u0bbf = \u00bd Fe<br \/>\n\u0b85\u0bb2\u0b95\u0bc1 \u0b95\u0ba9\u0bb5\u0bb3\u0bb5\u0bbf\u0bb2\u0bcd \u0b9a\u0bc7\u0bae\u0bbf\u0b95\u0bcd\u0b95\u0baa\u0bcd\u0baa\u0b9f\u0bcd\u0b9f \u0b9a\u0b95\u0bcd\u0ba4\u0bbf =\u00bdFe<br \/>\n= \u00bd \u00d7 \u03c3 \u00d7 \u03b5<br \/>\n= \u00bd \u00d7 \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u00d7 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd<br \/>\n<strong>\u0bb5\u0bc6\u0baa\u0bcd\u0baa\u0ba8\u0bbf\u0bb2\u0bc8 \u0bae\u0bbe\u0bb1\u0bcd\u0bb1\u0ba4\u0bcd\u0ba4\u0bbe\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0bb5\u0bbf\u0b9a\u0bc8\u0b95\u0bcd\u0b95\u0bbe\u0ba9 \u0b95\u0bcb\u0bb5\u0bc8<\/strong><\/p>\n<p>F= EAe\/l<br \/>\n<strong>\u0bb5\u0bc6\u0baa\u0bcd\u0baa\u0ba8\u0bbf\u0bb2\u0bc8 \u0b89\u0baf\u0bb0\u0bcd\u0bb5\u0bbe\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0ba8\u0bc0\u0b9f\u0bcd\u0b9a\u0bbf<\/strong><\/p>\n<p>F=EA *l 0 *\u00a0\u0394\u03b8\/ l0<\/p>\n<p>F=EA\u00a0\u221e\u00a0\u0394\u03b8<\/p>\n<p>\u0bb5\u0bbf\u0b9a\u0bc8 \u0b95\u0bcb\u0bb2\u0bbf\u0ba9\u0bcd \u0ba8\u0bc0\u0bb3\u0ba4\u0bcd\u0ba4\u0bbf\u0bb2\u0bcd \u0ba4\u0b99\u0bcd\u0b95\u0bbe\u0ba4\u0bc1<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 (\u03c3) \u0b92\u0bb0\u0bc1 \u0b9a\u0ba4\u0bc1\u0bb0 \u0b85\u0bb2\u0b95\u0bc1 \u0b95\u0bc1\u0bb1\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bb5\u0bc6\u0b9f\u0bcd\u0b9f\u0bc1\u0baa\u0bcd \u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bbf\u0bb2\u0bcd \u0ba4\u0bbe\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0bb5\u0bbf\u0b9a\u0bc8 \u0b86\u0b95\u0bc1\u0bae\u0bcd. \u0b85\u0bb2\u0b95\u0bc1 &#8211; Nm-2 \u0b86\u0b95\u0bc1\u0bae\u0bcd. \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd (\u03b5) \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1\u0bb1\u0bcd\u0bb1\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0b92\u0bb0\u0bc1 \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bbf\u0ba9\u0bcd \u0baa\u0bb0\u0bc1\u0bae\u0ba9\u0bbf\u0bb2\u0bcd \u0b85\u0bb2\u0bcd\u0bb2\u0ba4\u0bc1 \u0bb5\u0b9f\u0bbf\u0bb5\u0bbf\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0baa\u0bbf\u0ba9\u0bcd\u0ba9\u0bae\u0bbe\u0bb1\u0bcd\u0bb1\u0bae\u0bcd \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0b8e\u0ba9\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd. \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0baa\u0bb0\u0bbf\u0bae\u0bbe\u0ba9\u0bae\u0bcd \u0b85\u0bb2\u0b95\u0bb1\u0bcd\u0bb1\u0ba4\u0bc1. &nbsp; \u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b87\u0bb4\u0bc1\u0bb5\u0bbf\u0b9a\u0bc8\u0b95\u0bcd\u0b95\u0bc1 \u0b89\u0b9f\u0bcd\u0baa\u0b9f\u0bcd\u0b9f\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bca\u0ba9\u0bcd\u0bb1\u0bbf\u0ba9\u0bcd \u0b92\u0bb0\u0bc1 \u0b9a\u0ba4\u0bc1\u0bb0 \u0b85\u0bb2\u0b95\u0bc1 \u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bc1\u0b95\u0bcd\u0b95\u0bc1 \u0b9a\u0bc6\u0b99\u0bcd\u0b95\u0bc1\u0ba4\u0bcd\u0ba4\u0bbe\u0b95 \u0ba4\u0bbe\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd\u0bb5\u0bbf\u0b9a\u0bc8 \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b8e\u0ba9\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd. \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1\u0bb1\u0bcd\u0bb1\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0b87\u0bb4\u0bc8\u0baf\u0bca\u0ba9\u0bcd\u0bb1\u0bbf\u0ba9\u0bcd \u0b93\u0bb0\u0bb2\u0b95\u0bc1 \u0ba8\u0bc0\u0bb3\u0ba4\u0bcd\u0ba4\u0bbf\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0ba8\u0bc0\u0b9f\u0bcd\u0b9a\u0bbf \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd [&hellip;]<\/p>\n","protected":false},"author":842,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[160,36],"tags":[],"class_list":["post-6213","post","type-post","status-publish","format-standard","hentry","category-160","category-36"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bc1 \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 - Learning &amp; Education Portal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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\u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1\u0bb1\u0bcd\u0bb1\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0b92\u0bb0\u0bc1 \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bbf\u0ba9\u0bcd \u0baa\u0bb0\u0bc1\u0bae\u0ba9\u0bbf\u0bb2\u0bcd \u0b85\u0bb2\u0bcd\u0bb2\u0ba4\u0bc1 \u0bb5\u0b9f\u0bbf\u0bb5\u0bbf\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0baa\u0bbf\u0ba9\u0bcd\u0ba9\u0bae\u0bbe\u0bb1\u0bcd\u0bb1\u0bae\u0bcd \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0b8e\u0ba9\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd. \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0baa\u0bb0\u0bbf\u0bae\u0bbe\u0ba9\u0bae\u0bcd \u0b85\u0bb2\u0b95\u0bb1\u0bcd\u0bb1\u0ba4\u0bc1. &nbsp; \u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b87\u0bb4\u0bc1\u0bb5\u0bbf\u0b9a\u0bc8\u0b95\u0bcd\u0b95\u0bc1 \u0b89\u0b9f\u0bcd\u0baa\u0b9f\u0bcd\u0b9f\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0baa\u0bca\u0bb0\u0bc1\u0bb3\u0bca\u0ba9\u0bcd\u0bb1\u0bbf\u0ba9\u0bcd \u0b92\u0bb0\u0bc1 \u0b9a\u0ba4\u0bc1\u0bb0 \u0b85\u0bb2\u0b95\u0bc1 \u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bc1\u0b95\u0bcd\u0b95\u0bc1 \u0b9a\u0bc6\u0b99\u0bcd\u0b95\u0bc1\u0ba4\u0bcd\u0ba4\u0bbe\u0b95 \u0ba4\u0bbe\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd\u0bb5\u0bbf\u0b9a\u0bc8 \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1 \u0b8e\u0ba9\u0baa\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd. \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd \u0b87\u0bb4\u0bc1\u0bb5\u0bc8\u0ba4\u0bcd \u0ba4\u0b95\u0bc8\u0baa\u0bcd\u0baa\u0bc1\u0bb1\u0bcd\u0bb1\u0bbf\u0bb0\u0bc1\u0b95\u0bcd\u0b95\u0bc1\u0bae\u0bcd \u0b87\u0bb4\u0bc8\u0baf\u0bca\u0ba9\u0bcd\u0bb1\u0bbf\u0ba9\u0bcd \u0b93\u0bb0\u0bb2\u0b95\u0bc1 \u0ba8\u0bc0\u0bb3\u0ba4\u0bcd\u0ba4\u0bbf\u0bb2\u0bcd \u0b8f\u0bb1\u0bcd\u0baa\u0b9f\u0bc1\u0bae\u0bcd \u0ba8\u0bc0\u0b9f\u0bcd\u0b9a\u0bbf \u0b87\u0bb4\u0bc1\u0bb5\u0bc8 \u0bb5\u0bbf\u0b95\u0bbe\u0bb0\u0bae\u0bcd [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/astan.lk\/al_virtualclassroom\/ta\/\u0baa\u0bb0\u0baa\u0bcd\u0baa\u0bc1-\u0b87\u0bb4\u0bc1\u0bb5\u0bc8\/\" \/>\n<meta property=\"og:site_name\" content=\"Learning &amp; Education Portal\" \/>\n<meta property=\"article:published_time\" content=\"2019-02-15T23:12:49+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-02-16T03:32:21+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/chart.apis.google.com\/chart?cht=tx&amp;chl=%5Csigma%20%3D%20%5Cfrac%7BF%7D%7BA%7D\" \/>\n<meta name=\"author\" content=\"Admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Admin\" \/>\n<script type=\"application\/ld+json\" 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