{"id":5941,"date":"2020-10-13T11:53:10","date_gmt":"2020-10-13T06:23:10","guid":{"rendered":"http:\/\/astan.lk\/al_virtualclassroom\/?p=5941"},"modified":"2020-10-13T11:53:06","modified_gmt":"2020-10-13T06:23:06","slug":"electromagnetic-radiation","status":"publish","type":"post","link":"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/","title":{"rendered":"Electromagnetic radiation"},"content":{"rendered":"

\u2022 Energy is transmitted as electromagnetic radiation through the space. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2022 They consist of both electric and magnetic fields which are perpendicular to each other. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2022 Velocity of all the electromagnetic radiation in vacuum is; 3.00 x 10\u2078 m s-1 which is the velocity of light. \u2022 When is the wave length and is the frequency, the velocity of an electromagnetic wave- C = \u03c5\u03bb. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2022 The energy of an electromagnetic wave E = h\u03c5\u00a0(E is the energy of a photon.) where h is a constant. It is named as Planck’s constant. Planck constant = 6.624 x 10-34<\/sup> J s<\/p>\n

Arrangement of the electromagnetic radiations in the ascending order of the frequency produces the electromagnetic spectrum.<\/p>\n

\"Electromagnetic-Spectrum.svg\"<\/a><\/p>\n

Uses of the radiations belonging to different ranges of the electromagnetic spectrum<\/span><\/strong><\/p>\n

\u2022 Radio waves : Used for communication through television and radio media.<\/p>\n

\u2022 Radar waves : Used in naval and aeronautical security systems.<\/p>\n

\u2022 Micro waves : Microwave ovens function due to these waves. Used in cellular phones.<\/p>\n

\u2022 Infrared waves : Used in physiotherapy treatments. Used in sending signals by remote control devices and also in analytical work using spectroscopic methods.<\/p>\n

\u2022 Visible waves : Vision and photography are due to waves in this range. Used in colorimetric analysis.<\/p>\n

\u2022 Ultraviolet waves : Used for sterilization and to read confidential symbols in currency notes etc. Also used in spectroscopic analysis.<\/p>\n

\u2022 X- rays : Used in X ray photography and in studies of the structure of crystals etc.<\/p>\n

\u2022 \u03b3\u00a0rays : Used in the treatment of cancer.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u2022 Energy is transmitted as electromagnetic radiation through the space. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2022 They consist of both electric and magnetic fields which are perpendicular to each other. \u00a0 […]<\/p>\n","protected":false},"author":842,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[14,1652],"tags":[],"class_list":["post-5941","post","type-post","status-publish","format-standard","hentry","category-chemistry","category-unit-01"],"acf":[],"yoast_head":"\nElectromagnetic radiation - Learning & Education Portal<\/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:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Electromagnetic radiation - Learning & Education Portal\" \/>\n<meta property=\"og:description\" content=\"\u2022 Energy is transmitted as electromagnetic radiation through the space. \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2022 They consist of both electric and magnetic fields which are perpendicular to each other. \u00a0 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/\" \/>\n<meta property=\"og:site_name\" content=\"Learning & Education Portal\" \/>\n<meta property=\"article:published_time\" content=\"2020-10-13T06:23:10+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/Electromagnetic-Spectrum.svg_.png\" \/>\n<meta name=\"author\" content=\"Admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/\"},\"author\":{\"name\":\"Admin\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/person\/ffb0504e2cfb71518790b2fffd668c59\"},\"headline\":\"Electromagnetic radiation\",\"datePublished\":\"2020-10-13T06:23:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/\"},\"wordCount\":232,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#organization\"},\"image\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/#primaryimage\"},\"thumbnailUrl\":\"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/Electromagnetic-Spectrum.svg_.png\",\"articleSection\":[\"Chemistry\",\"Unit 01\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/\",\"url\":\"https:\/\/astan.lk\/al_virtualclassroom\/electromagnetic-radiation\/\",\"name\":\"Electromagnetic radiation - 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