{"id":91338,"date":"2025-06-01T10:53:44","date_gmt":"2025-06-01T10:53:44","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91338"},"modified":"2025-06-01T10:53:44","modified_gmt":"2025-06-01T10:53:44","slug":"with-reference-to-lifi-recently-in-the-news-which-of-the-following","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/","title":{"rendered":"With reference to &#8216;LiFi&#8217;, recently in the news, which of the following"},"content":{"rendered":"<p>With reference to &#8216;LiFi&#8217;, recently in the news, which of the following statements is\/are correct?<\/p>\n<ul>\n<li>It uses light as the medium for high-speed data transmission.<\/li>\n<li>It is a wireless technology and is several times faster than &#8216;WiFi&#8217;.<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below.<\/p>\n<p>[amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;2 only&#8221; option3=&#8221;Both 1 and 2&#8243; option4=&#8221;Neither 1 nor 2&#8243; correct=&#8221;option3&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC IAS &#8211; 2016<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-ias-2016.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-ias-2016\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nLiFi (Light Fidelity) is a cutting-edge wireless communication technology that uses visible light spectrum for data transmission, similar to how WiFi uses radio waves. It was coined by Harald Haas from the University of Edinburgh.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nLet&#8217;s analyze each statement:<br \/>\n1.  **It uses light as the medium for high-speed data transmission:** LiFi utilizes Visible Light Communication (VLC) technology, where data is transmitted by modulating the intensity of light emitted by LEDs. The rapid flickering of LEDs is undetectable to the human eye but can be interpreted by a light sensor to decode data. This statement is correct.<br \/>\n2.  **It is a wireless technology and is several times faster than &#8216;WiFi&#8217;:** LiFi is indeed a wireless technology, similar to WiFi, but uses light waves instead of radio waves. Due to the vast bandwidth available in the visible light spectrum compared to the radio spectrum, LiFi has the potential to offer significantly higher data transfer speeds than conventional WiFi. Lab tests and demonstrations have shown speeds multiple times faster than typical WiFi speeds. This statement is correct.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nLiFi has potential applications in areas where radio frequency interference is a concern (e.g., aircraft cabins, hospitals) or where high-density data usage is required. However, its main limitation is that light cannot penetrate opaque objects, meaning it is typically confined to line-of-sight or within a specific room.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>With reference to &#8216;LiFi&#8217;, recently in the news, which of the following statements is\/are correct? It uses light as the medium for high-speed data transmission. It is a wireless technology and is several times faster than &#8216;WiFi&#8217;. Select the correct answer using the code given below. [amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;2 only&#8221; option3=&#8221;Both 1 and 2&#8243; &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"With reference to &#8216;LiFi&#8217;, recently in the news, which of the following\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/#more-91338\">Detailed Solution<span class=\"screen-reader-text\">With reference to &#8216;LiFi&#8217;, recently in the news, which of the following<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1092],"tags":[1098,1113],"class_list":["post-91338","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1098","tag-information-and-communication-technology","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>With reference to &#039;LiFi&#039;, recently in the news, which of the following<\/title>\n<meta name=\"description\" content=\"LiFi (Light Fidelity) is a cutting-edge wireless communication technology that uses visible light spectrum for data transmission, similar to how WiFi uses radio waves. It was coined by Harald Haas from the University of Edinburgh. Let&#039;s analyze each statement: 1. **It uses light as the medium for high-speed data transmission:** LiFi utilizes Visible Light Communication (VLC) technology, where data is transmitted by modulating the intensity of light emitted by LEDs. The rapid flickering of LEDs is undetectable to the human eye but can be interpreted by a light sensor to decode data. This statement is correct. 2. **It is a wireless technology and is several times faster than &#039;WiFi&#039;:** LiFi is indeed a wireless technology, similar to WiFi, but uses light waves instead of radio waves. Due to the vast bandwidth available in the visible light spectrum compared to the radio spectrum, LiFi has the potential to offer significantly higher data transfer speeds than conventional WiFi. Lab tests and demonstrations have shown speeds multiple times faster than typical WiFi speeds. This statement is correct.\" \/>\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\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"With reference to &#039;LiFi&#039;, recently in the news, which of the following\" \/>\n<meta property=\"og:description\" content=\"LiFi (Light Fidelity) is a cutting-edge wireless communication technology that uses visible light spectrum for data transmission, similar to how WiFi uses radio waves. It was coined by Harald Haas from the University of Edinburgh. Let&#039;s analyze each statement: 1. **It uses light as the medium for high-speed data transmission:** LiFi utilizes Visible Light Communication (VLC) technology, where data is transmitted by modulating the intensity of light emitted by LEDs. The rapid flickering of LEDs is undetectable to the human eye but can be interpreted by a light sensor to decode data. This statement is correct. 2. **It is a wireless technology and is several times faster than &#039;WiFi&#039;:** LiFi is indeed a wireless technology, similar to WiFi, but uses light waves instead of radio waves. Due to the vast bandwidth available in the visible light spectrum compared to the radio spectrum, LiFi has the potential to offer significantly higher data transfer speeds than conventional WiFi. Lab tests and demonstrations have shown speeds multiple times faster than typical WiFi speeds. This statement is correct.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:53:44+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"With reference to 'LiFi', recently in the news, which of the following","description":"LiFi (Light Fidelity) is a cutting-edge wireless communication technology that uses visible light spectrum for data transmission, similar to how WiFi uses radio waves. It was coined by Harald Haas from the University of Edinburgh. Let's analyze each statement: 1. **It uses light as the medium for high-speed data transmission:** LiFi utilizes Visible Light Communication (VLC) technology, where data is transmitted by modulating the intensity of light emitted by LEDs. The rapid flickering of LEDs is undetectable to the human eye but can be interpreted by a light sensor to decode data. This statement is correct. 2. **It is a wireless technology and is several times faster than 'WiFi':** LiFi is indeed a wireless technology, similar to WiFi, but uses light waves instead of radio waves. Due to the vast bandwidth available in the visible light spectrum compared to the radio spectrum, LiFi has the potential to offer significantly higher data transfer speeds than conventional WiFi. Lab tests and demonstrations have shown speeds multiple times faster than typical WiFi speeds. This statement is correct.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/","og_locale":"en_US","og_type":"article","og_title":"With reference to 'LiFi', recently in the news, which of the following","og_description":"LiFi (Light Fidelity) is a cutting-edge wireless communication technology that uses visible light spectrum for data transmission, similar to how WiFi uses radio waves. It was coined by Harald Haas from the University of Edinburgh. Let's analyze each statement: 1. **It uses light as the medium for high-speed data transmission:** LiFi utilizes Visible Light Communication (VLC) technology, where data is transmitted by modulating the intensity of light emitted by LEDs. The rapid flickering of LEDs is undetectable to the human eye but can be interpreted by a light sensor to decode data. This statement is correct. 2. **It is a wireless technology and is several times faster than 'WiFi':** LiFi is indeed a wireless technology, similar to WiFi, but uses light waves instead of radio waves. Due to the vast bandwidth available in the visible light spectrum compared to the radio spectrum, LiFi has the potential to offer significantly higher data transfer speeds than conventional WiFi. Lab tests and demonstrations have shown speeds multiple times faster than typical WiFi speeds. This statement is correct.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:53:44+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/","url":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/","name":"With reference to 'LiFi', recently in the news, which of the following","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:53:44+00:00","dateModified":"2025-06-01T10:53:44+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"LiFi (Light Fidelity) is a cutting-edge wireless communication technology that uses visible light spectrum for data transmission, similar to how WiFi uses radio waves. It was coined by Harald Haas from the University of Edinburgh. Let's analyze each statement: 1. **It uses light as the medium for high-speed data transmission:** LiFi utilizes Visible Light Communication (VLC) technology, where data is transmitted by modulating the intensity of light emitted by LEDs. The rapid flickering of LEDs is undetectable to the human eye but can be interpreted by a light sensor to decode data. This statement is correct. 2. **It is a wireless technology and is several times faster than 'WiFi':** LiFi is indeed a wireless technology, similar to WiFi, but uses light waves instead of radio waves. Due to the vast bandwidth available in the visible light spectrum compared to the radio spectrum, LiFi has the potential to offer significantly higher data transfer speeds than conventional WiFi. Lab tests and demonstrations have shown speeds multiple times faster than typical WiFi speeds. This statement is correct.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-lifi-recently-in-the-news-which-of-the-following\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC IAS","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-ias\/"},{"@type":"ListItem","position":3,"name":"With reference to &#8216;LiFi&#8217;, recently in the news, which of the following"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/91338","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=91338"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/91338\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=91338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=91338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=91338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}