<?xml version="1.0"?>
<oembed><version>1.0</version><provider_name>Learning &amp; Education Portal</provider_name><provider_url>https://astan.lk/al_virtualclassroom</provider_url><author_name>Admin</author_name><author_url>https://astan.lk/al_virtualclassroom/author/astan-preceptor1/</author_url><title>Wave-Particle Duality - Learning &amp; Education Portal</title><type>rich</type><width>600</width><height>338</height><html>&lt;blockquote class="wp-embedded-content" data-secret="hIH1MwKce5"&gt;&lt;a href="https://astan.lk/al_virtualclassroom/wave-nature-of-matter/"&gt;Wave-Particle Duality&lt;/a&gt;&lt;/blockquote&gt;&lt;iframe sandbox="allow-scripts" security="restricted" src="https://astan.lk/al_virtualclassroom/wave-nature-of-matter/embed/#?secret=hIH1MwKce5" width="600" height="338" title="&#x201C;Wave-Particle Duality&#x201D; &#x2014; Learning &amp; Education Portal" data-secret="hIH1MwKce5" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"&gt;&lt;/iframe&gt;&lt;script type="text/javascript"&gt;
/* &lt;![CDATA[ */
/*! This file is auto-generated */
!function(d,l){"use strict";l.querySelector&amp;&amp;d.addEventListener&amp;&amp;"undefined"!=typeof URL&amp;&amp;(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&amp;&amp;!/[^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&lt;o.length;i++)o[i].style.display="none";for(i=0;i&lt;a.length;i++)s=a[i],e.source===s.contentWindow&amp;&amp;(s.removeAttribute("style"),"height"===t.message?(1e3&lt;(r=parseInt(t.value,10))?r=1e3:~~r&lt;200&amp;&amp;(r=200),s.height=r):"link"===t.message&amp;&amp;(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&amp;&amp;n.host===r.host&amp;&amp;l.activeElement===s&amp;&amp;(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&lt;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);
//# sourceURL=https://astan.lk/al_virtualclassroom/wp-includes/js/wp-embed.min.js
/* ]]&gt; */
&lt;/script&gt;
</html><description>Publicized early in the debate about whether light was composed of particles or waves, a wave-particle dual nature soon was found to be characteristic of electrons as well. The evidence for the description of light as waves was well established at the turn of the century when the photoelectric effect introduced firm evidence of a [&hellip;]</description><thumbnail_url>http://hyperphysics.phy-astr.gsu.edu/hbase/imgmod2/wavp.gif</thumbnail_url></oembed>

<!--
Performance optimized by W3 Total Cache. Learn more: https://www.boldgrid.com/w3-total-cache/

Page Caching using Disk: Enhanced (Requested URI contains query) 
Lazy Loading
Database Caching 29/45 queries in 0.017 seconds using Disk

Served from: astan.lk @ 2026-04-23 15:41:28 by W3 Total Cache
-->