{"id":17120,"date":"2023-11-18T10:33:49","date_gmt":"2023-11-18T05:03:49","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=17120"},"modified":"2025-04-05T02:17:08","modified_gmt":"2025-04-04T20:47:08","slug":"gamma-ray-burst","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/gamma-ray-burst\/","title":{"rendered":"Gamma-ray burst"},"content":{"rendered":"<h2>About Gamma-ray burst<\/h2>\n<ul>\n<li>It is a powerful astronomical cosmic\u00a0burst of high-energy gamma-ray.<\/li>\n<li>It\u00a0emits more energy in a few seconds than our Sun will emit in its lifetime.<\/li>\n<li>It has\u00a0two distinct emission phases: the\u00a0short-lived prompt emission (the initial burst phase that emits gamma-rays), followed by a\u00a0long-lived multi-wavelength afterglow phase.\u00a0<\/li>\n<li>The shortest GRBs likely mark the\u00a0collision of two compact stellar remnants called neutron stars, and the longest bursts are thought to arise when a massive, rapidly spinning star collapses to form a black hole.<\/li>\n<li>Sources of Gamma Ray\n<ul>\n<li>They are produced by\u00a0the hottest and most energetic objects in the universe, such as\u00a0neutron stars and pulsars, supernova explosions, and regions around black holes.<\/li>\n<li>On Earth, gamma waves are generated by\u00a0nuclear explosions, lightning, and the less dramatic activity of radioactive decay.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>What is the Ionosphere?<\/h2>\n<ul>\n<li>It is a layer of the\u00a0planet&#8217;s upper atmosphere that contains electrically charged gases called plasma.<\/li>\n<li>It is situated about\u00a030-600 miles (50-950 km) above\u00a0Earth&#8217;s surface.<\/li>\n<li>It helps form the boundary between the vacuum of space and the lower atmosphere.<\/li>\n<li>It helps\u00a0protect life on Earth by absorbing harmful ultraviolet rays from the sun.<\/li>\n<li>It is highly\u00a0sensitive to changing magnetic and electrical conditions in space, usually connected to solar activity.<\/li>\n<li>It also\u00a0expands and contracts in response to\u00a0solar radiation.<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is Solar radiation?<\/h3>\n<p>It refers to the energy emitted by the Sun in the form of electromagnetic waves. It&#8217;s the primary source of energy for Earth and plays a crucial role in sustaining life and driving various natural processes. This radiation encompasses a spectrum of wavelengths, including visible light, ultraviolet (UV) radiation, and infrared radiation.<\/p>\n<p><strong>Source:<\/strong> <a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/gamma-ray-burst-in-faraway-galaxy-disturbed-earths-upper-atmosphere\/article67544907.ece\" target=\"_blank\" rel=\"nofollow noopener\">Gamma-ray burst in faraway galaxy disturbed Earth&#8217;s upper atmosphere<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gamma-ray burst is a powerful astronomical cosmic burst of high-energy gamma-ray.<\/p>\n","protected":false},"author":5,"featured_media":17121,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17120","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\/17120","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=17120"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/17120\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/17121"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=17120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=17120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=17120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}