1.0IB Computer Sciencehttps://learnlearn.uk/ibcslearnlearnadminhttps://learnlearn.uk/ibcs/author/learnlearnadmin/rich600338<blockquote class="wp-embedded-content" data-secret="WMqlwSEg3b"><a href="https://learnlearn.uk/ibcs/optical-data-transmission/">Optical Data Transmission</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://learnlearn.uk/ibcs/optical-data-transmission/embed/#?secret=WMqlwSEg3b" width="600" height="338" title="“Optical Data Transmission” — IB Computer Science" data-secret="WMqlwSEg3b" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !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); //# sourceURL=https://learnlearn.uk/ibcs/wp-includes/js/wp-embed.min.js </script> Introduction to Optical Data Transmission Using light to transmit signals is nothing new. Signal fires and smoke signals have been used for thousands of years. Because light travels incredibly fast signals could be sent from place to place very quickly. Native Americans and other cultures used smoke signals and the Chinese signal tower system along… Read More »https://learnlearn.uk/igcsecs/wp-content/uploads/sites/23/2021/05/great-wall-towers-300x200.jpg