{"id":48765,"date":"2024-04-15T22:46:00","date_gmt":"2024-04-15T22:46:00","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=48765"},"modified":"2024-04-15T22:46:00","modified_gmt":"2024-04-15T22:46:00","slug":"which-of-the-following-do-not-undergo-free-space-propagation","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-do-not-undergo-free-space-propagation\/","title":{"rendered":"Which of the following do not undergo free space propagation?"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;Wired telephone systems&#8221; option2=&#8221;Wireless line of sight radio links&#8221; option3=&#8221;Microwave line of sight radio links&#8221; option4=&#8221;Satellite communication system&#8221; correct=&#8221;option1&#8243;]<!--more--><\/p>\n<p>The correct answer is: <strong>A. Wired telephone systems<\/strong><\/p>\n<p>Free space propagation is the propagation of electromagnetic waves through a vacuum or through air. It is a common mode of propagation for radio waves, microwaves, and light.<\/p>\n<p>Wired telephone systems do not undergo free space propagation because they are not using electromagnetic waves to transmit information. Instead, they use electrical signals that are carried through wires.<\/p>\n<p>Wireless line of sight radio links, microwave line of sight radio links, and satellite communication systems all use electromagnetic waves to transmit information. Therefore, they all undergo free space propagation.<\/p>\n<p>Here is a more detailed explanation of each option:<\/p>\n<ul>\n<li><strong>A. Wired telephone systems<\/strong> use electrical signals that are carried through wires. These signals do not propagate through free space.<\/li>\n<li><strong>B. Wireless line of sight radio links<\/strong> use radio waves to transmit information. Radio waves are a type of electromagnetic wave that can propagate through free space.<\/li>\n<li><strong>C. Microwave line of sight radio links<\/strong> use microwaves to transmit information. Microwaves are a type of electromagnetic wave that can propagate through free space.<\/li>\n<li><strong>D. Satellite communication systems<\/strong> use satellites to transmit information. Satellites are located in space, which is a vacuum. Therefore, the signals from satellite communication systems propagate through free space.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;Wired telephone systems&#8221; option2=&#8221;Wireless line of sight radio links&#8221; option3=&#8221;Microwave line of sight radio links&#8221; option4=&#8221;Satellite communication system&#8221; correct=&#8221;option1&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[199],"tags":[],"class_list":["post-48765","post","type-post","status-publish","format-standard","hentry","category-wireless-communication","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Which of the following do not undergo free space propagation?<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-do-not-undergo-free-space-propagation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the following do not undergo free space propagation?\" \/>\n<meta property=\"og:description\" content=\"[amp_mcq option1=&#8221;Wired telephone systems&#8221; 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