{"id":83828,"date":"2019-10-14T04:14:33","date_gmt":"2019-10-14T04:14:33","guid":{"rendered":"https:\/\/www.edristi.in\/?p=83828"},"modified":"2019-10-14T04:14:35","modified_gmt":"2019-10-14T04:14:35","slug":"gravitational-waves-detected","status":"publish","type":"post","link":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/gravitational-waves-detected\/","title":{"rendered":"Gravitational waves detected"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Question: Recently Scientists have detected gravitational waves first time from a newly born-<br> (a) Black hole<br> (b) Star<br> (c) Neutron Star <br> (d) Elliptical Galaxy<br> Answer: (a)<br> Related facts:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>In September 2019; scientists have detected gravitational waves first time from a newly born black hole.<\/li><li>This discovery was made by the researchers from Massachusetts Institute of Technology (MIT) in the United States. The study, published in the journal Physical Review Letters. <\/li><li>They observed that these gravitational waves have ringing pattern of the waves just as the sound waves emanating from the ringing bell.<\/li><li>Scientists say that ringing pattern of gravitational waves predicts the cosmic body\u2019s mass and spin and it provides more evidence for Einstein\u2019s General Theory of Relativity.<\/li><li>Einstein\u2019s General Theory of Relativity predicted that a black hole of a given mass and spin can only produce tones of a certain pitch and decay.<\/li><li>This discovery increases the possibility that black holes exhibit only three observable properties \u2013 mass, spin, and electric charge.<\/li><li>All other properties, the study noted, could be swallowed up by the black hole itself, and are unobservable.<\/li><li>Researchers from the MIT in the U.S calculated the mass and spin that the black hole should have using physicist Albert Einstein\u2019s General Theory of Relativity, given its ringing pattern.<\/li><li>These calculations, according to the study, matched earlier measurements of the black hole\u2019s mass and spin.<\/li><li>Researchers say that Einstein\u2019s general relativity theory for the first time is being confirmed by this way. <\/li><li>By concentrating on the last few milliseconds of the signal, immediately following the chirp\u2019s peak, the researchers were able to observe the newly formed black hole\u2019s ringing.<\/li><li>Researchers detect an overall gravitational wave signal that\u2019s made up of multiple frequencies, which fade away at different rates, like the different pitches that make up a sound.<\/li><li>Each frequency or tone corresponds to a vibrational frequency of the new black hole.<\/li><li>The team used the equations of General Theory of Relativity to calculate the newly formed black hole\u2019s mass and spin using the detected information on its pitch and decay.<\/li><li>Their calculations matched with calculations of the black hole\u2019s mass and spin which were made previously.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Gravitational waves and their detection:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>When an object accelerates, it creates ripples in space-time, these space-time ripples are known as gravitational waves.<\/li><li>In another way we can understand gravitational waves just like a boat causes ripples in a pond or an accelerating electrical charge produces an electromagnetic wave.<\/li><li>Gravitational waves are extremely weak so are very difficult to detect.<\/li><li>It should be known that the gravitational waves, for the first time  were detected on September 14, 2015,  the twin Laser Interferometer Gravitational-wave Observatory (LIGO) detectors, located in Livingston, Louisiana, and Hanford, Washington, USA.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Links:<br><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/gravitational-waves-detected-for-first-time-from-newly-born-black-hole-study\/article29408037.ece\">https:\/\/www.thehindu.com\/sci-tech\/science\/gravitational-waves-detected-for-first-time-from-newly-born-black-hole-study\/article29408037.ece<br><\/a><a href=\"https:\/\/www.digitaltrends.com\/news\/black-hole-albert-einstein-gravitational-waves-chirp\/\">https:\/\/www.digitaltrends.com\/news\/black-hole-albert-einstein-gravitational-waves-chirp\/<br><\/a><a href=\"http:\/\/www.physics.org\/article-questions.asp?id=138\">http:\/\/www.physics.org\/article-questions.asp?id=138<\/a><br><a href=\"https:\/\/www.ligo.caltech.edu\/news\/ligo20160211\">https:\/\/www.ligo.caltech.edu\/news\/ligo20160211<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Question: Recently Scientists have detected gravitational waves first time from a newly born- (a) Black hole (b) Star (c) Neutron Star (d) Elliptical Galaxy Answer: (a) Related facts: In September 2019; scientists have detected gravitational waves first time from a newly born black hole. This discovery was made by the researchers from Massachusetts Institute of [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":83829,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1131],"tags":[],"class_list":["post-83828","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dssn"],"_links":{"self":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/posts\/83828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/comments?post=83828"}],"version-history":[{"count":0,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/posts\/83828\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/media\/83829"}],"wp:attachment":[{"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/media?parent=83828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/categories?post=83828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.edristi.in\/hi\/%e0%a4%b9%e0%a5%8b%e0%a4%ae\/wp-json\/wp\/v2\/tags?post=83828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}