1.0IB Computer Sciencehttps://learnlearn.uk/ibcslearnlearnadminhttps://learnlearn.uk/ibcs/author/learnlearnadmin/rich600338<blockquote class="wp-embedded-content" data-secret="FvEKvI14pK"><a href="https://learnlearn.uk/ibcs/wireless-transmission-media/">Wireless Transmission Media</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://learnlearn.uk/ibcs/wireless-transmission-media/embed/#?secret=FvEKvI14pK" width="600" height="338" title="“Wireless Transmission Media” — IB Computer Science" data-secret="FvEKvI14pK" 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> What are radio waves? Radio and microwaves are electromagnetic waves on the long end of the electromagnetic spectrum. They were first discovered in 1886 by Heinrich Hertz and radio was first used commercially in 1900. Due to the issues around interference between radio users, radio transmission is highly regulated by laws all around the world… Read More »https://learnlearn.uk/igcsecs/wp-content/uploads/sites/23/2021/05/cyrstaal-radio-300x300.jpg