{"id":1358,"date":"2024-02-17T18:40:44","date_gmt":"2024-02-17T13:10:44","guid":{"rendered":"https:\/\/lotusarise.com\/qna\/?p=1358"},"modified":"2024-04-03T07:14:52","modified_gmt":"2024-04-03T01:44:52","slug":"q-recently-scientists-observed-the-merger-of-giant-blackholes-billions-of-light-years-away-from-the-earth-what-is-the-significance-of-this-observation","status":"publish","type":"post","link":"https:\/\/lotusarise.com\/qna\/upsc\/q-recently-scientists-observed-the-merger-of-giant-blackholes-billions-of-light-years-away-from-the-earth-what-is-the-significance-of-this-observation","title":{"rendered":"Q.\u00a0Recently, Scientists observed the merger of giant blackholes\u2019 billions of light-years away from the Earth. What is the significance of this observation?"},"content":{"rendered":"\n<ul class=\"mcq wp-block-list\">\n<li>\u2018Higgs boson particles\u2019 were detected.<\/li>\n\n\n\n<li>\u2018Gravitational waves\u2019 were detected.<\/li>\n\n\n\n<li>Possibility of inter-galactic space travel through \u2018wormhole\u2019 was confirmed.<\/li>\n\n\n\n<li>It enabled the scientists to understand \u2018singularity\u2019.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Answer:&nbsp;(b) \u2018Gravitational waves\u2019 were detected.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"gravitational-waves\">Gravitational Waves<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gravitational waves are&nbsp;<strong>waves of the intensity of gravity that are generated by the accelerated masses of binary stars and other motions of gravitating masses<\/strong>, and propagate as waves outward from their source at the speed of light.<\/li>\n\n\n\n<li><strong>Albert Einstein<\/strong>&nbsp;predicted their existence in his&nbsp;<strong>general theory of Relativity in 1916.<\/strong><\/li>\n\n\n\n<li><strong>Production of Gravitational Waves<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Cataclysmic Events:<\/strong>&nbsp;The strongest gravitational waves originate from<strong>&nbsp;colliding&nbsp;black holes, supernovae, and colliding neutron stars.<\/strong><\/li>\n\n\n\n<li><strong>Neutron Star Rotation<\/strong>: Gravitational waves can also be produced by the&nbsp;<strong>rotation of non-perfectly spherical neutron stars<\/strong>&nbsp;and possibly remnants of gravitational radiation from the<strong>&nbsp;Big Bang.<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Features and Detection<\/strong>\n<ul class=\"wp-block-list\">\n<li>Gravitational waves are challenging to detect due to their&nbsp;<strong>weak interaction with matter.<\/strong>&nbsp;Sensitive instruments like interferometers, such as the LIGO, are developed to detect gravitational waves by measuring tiny disturbances in space-time.<\/li>\n\n\n\n<li>The first direct observation of gravitational waves was made in 2015, when a&nbsp;<strong>signal generated by the merger of two black holes was received by the LIGO gravitational wave detectors<\/strong>&nbsp;in Livingston, Louisiana, and in Hanford, Washington.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Why detect them?<\/strong>\n<ul class=\"wp-block-list\">\n<li>Gravitational waves provide a new way of observing the universe, allowing scientists to study and explore phenomena that were previously inaccessible.<\/li>\n\n\n\n<li>They provide valuable information about astrophysical events, such as the merger of black holes or neutron stars.<\/li>\n\n\n\n<li>They can offer insights into the nature of gravity, the properties of massive objects, and the early universe itself.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"giant-metrewave-radio-telescope-gmrt\"><strong>Giant Metrewave Radio Telescope (GMRT)<\/strong><\/h6>\n\n\n\n<ul class=\"wp-block-list\">\n<li>GMRT is a&nbsp;<strong>low-frequency radio telescope<\/strong>&nbsp;that helps investigate various radio astrophysical problems ranging from nearby solar systems to the edge of the observable universe.<\/li>\n\n\n\n<li>Located at Khodad, 80 km north of Pune, the telescope is operated by the&nbsp;<strong>National Centre of Radio Astrophysics (NCRA).<\/strong>\n<ul class=\"wp-block-list\">\n<li>NCRA is a part of the Tata Institute of Fundamental Research (TIFR), Mumbai.<\/li>\n\n\n\n<li>GMRT is a project of the Department of Atomic Energy (DAE), operating under the Tata Institute of Fundamental Research (TIFR).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>It consists of 30 fully- steerable dish type antennas of 45-meter diameter each, spread over a 25-km region.\n<ul class=\"wp-block-list\">\n<li>GMRT is presently the&nbsp;<strong>world\u2019s largest radio telescope operating at meter wavelength<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>GMRT is a very versatile instrument for investigating a variety of radio astrophysical problems. Two of its most important astrophysical objectives are:\n<ul class=\"wp-block-list\">\n<li><strong>to detect the highly&nbsp;redshifted spectral line of neutral Hydrogen<\/strong>&nbsp;expected from protoclusters or protogalaxies before they condensed to form galaxies in the early phase of the Universe;\n<ul class=\"wp-block-list\">\n<li>Redshift represents the signal\u2019s wavelength change depending on the object\u2019s location and movement.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>to search for and study rapidly-rotating Pulsars<\/strong>&nbsp;in our galaxy.\n<ul class=\"wp-block-list\">\n<li>Pulsars are rapidly rotating neutron stars with extremely high densities.<\/li>\n\n\n\n<li>A pulsar is like a&nbsp;<strong>cosmic lighthouse<\/strong>&nbsp;as it emits radio beams that flashes by the Earth regularly akin to a harbour lighthouse.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Answer:&nbsp;(b) \u2018Gravitational waves\u2019 were detected. Gravitational Waves Giant Metrewave Radio Telescope (GMRT)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1,3],"tags":[44],"years":[54],"class_list":["post-1358","post","type-post","status-publish","format-standard","hentry","category-upsc","category-prelims","tag-science-and-tech","years-54"],"acf":[],"taxonomy_info":{"category":[{"value":1,"label":"UPSC"},{"value":3,"label":"Prelims"}],"post_tag":[{"value":44,"label":"Science and Tech"}],"years":[{"value":54,"label":"2019"}]},"featured_image_src_large":false,"author_info":{"display_name":"LotusArise","author_link":"https:\/\/lotusarise.com\/qna\/author\/team-lotusarise"},"comment_info":0,"category_info":[{"term_id":1,"name":"UPSC","slug":"upsc","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":1269,"filter":"raw","cat_ID":1,"category_count":1269,"category_description":"","cat_name":"UPSC","category_nicename":"upsc","category_parent":0},{"term_id":3,"name":"Prelims","slug":"prelims","term_group":0,"term_taxonomy_id":3,"taxonomy":"category","description":"","parent":1,"count":1251,"filter":"raw","cat_ID":3,"category_count":1251,"category_description":"","cat_name":"Prelims","category_nicename":"prelims","category_parent":1}],"tag_info":[{"term_id":44,"name":"Science and Tech","slug":"science-and-tech","term_group":0,"term_taxonomy_id":44,"taxonomy":"post_tag","description":"","parent":0,"count":167,"filter":"raw"}],"_links":{"self":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/1358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/comments?post=1358"}],"version-history":[{"count":1,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/1358\/revisions"}],"predecessor-version":[{"id":1367,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/1358\/revisions\/1367"}],"wp:attachment":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/media?parent=1358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/categories?post=1358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/tags?post=1358"},{"taxonomy":"years","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/years?post=1358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}