{"id":19430,"date":"2024-01-17T10:58:21","date_gmt":"2024-01-17T05:28:21","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=19430"},"modified":"2025-04-05T17:29:47","modified_gmt":"2025-04-05T11:59:47","slug":"led","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/led\/","title":{"rendered":"What are Light-Emitting Diodes?"},"content":{"rendered":"<h2>About Light-Emitting Diodes<\/h2>\n<ul>\n<li>A diode is an\u00a0electronic component which has two points of contact, or terminals, called its anode and cathode.<\/li>\n<li>A diode\u2019s primary purpose is\u00a0to allow current to flow in only one direction.<\/li>\n<li>An LED is a\u00a0semiconductor device which emits light when electric current flows through it.<\/li>\n<li>It can produce all three primary colours \u2013\u00a0red, green, and blue \u2013 different LEDs can be combined on a display board to produce a large variety of colours.<\/li>\n<\/ul>\n<h2>Advantages of LED<\/h2>\n<ul>\n<li>Energy Efficiency: It requires far less electricity to produce the same light as incandescent bulbs. LEDs use approximately 75-80% less energy than traditional incandescent bulbs<\/li>\n<li>Durability:\u00a0LED bulbs are highly durable and resistant to shocks, vibrations, and temperature fluctuations.<\/li>\n<li>Instant Illumination:\u00a0It provides instant illumination without the warm-up period required by incandescent bulbs.<\/li>\n<li>Heat Generation:\u00a0LED bulbs generate very little heat, making them safer to handle and more efficient in terms of energy utilization.\u00a0<\/li>\n<li>Environmental Impact:\u00a0LEDs have a significantly lower environmental impact compared to incandescent. The energy efficiency and longer lifespan result in reduced greenhouse gas emissions and less waste.<\/li>\n<\/ul>\n<h2>What are the Applications of LEDs?<\/h2>\n<ul>\n<li>LEDs\u00a0have several applications in industry, consumer electronics, and household appliances: from smartphones to TV screens, from signboards to \u2018feeding\u2019 plants light in greenhouses, from barcode scanners to monitoring air quality.<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is a semiconductor?<\/h3>\n<p>It is a substance that has specific electrical properties that enable it to serve as a foundation for computers and other electronic devices. It is typically a solid chemical element or compound that conducts electricity under certain conditions but not others.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/light-emitting-diode-physics-haitz-law-explained\/article67743616.ece\" target=\"_blank\" rel=\"nofollow noopener\"><u>What are light-emitting diodes and why are they prized as light sources? | Explained<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Light-Emitting Diode  is a semiconductor device which emits light when electric current flows through it.<\/p>\n","protected":false},"author":5,"featured_media":19431,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-19430","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/19430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=19430"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/19430\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/19431"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=19430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=19430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=19430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}