{"id":127704,"date":"2021-09-15T14:26:11","date_gmt":"2021-09-15T21:26:11","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2021\/09\/researchers-find-source-of-strange-negative-gravity"},"modified":"2021-09-15T14:26:11","modified_gmt":"2021-09-15T21:26:11","slug":"researchers-find-source-of-strange-negative-gravity","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2021\/09\/researchers-find-source-of-strange-negative-gravity","title":{"rendered":"Researchers Find Source of Strange \u2018Negative\u2019 Gravity"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/researchers-find-source-of-strange-negative-gravity.jpg\"><\/a><\/p>\n<p>Circa 2017<\/p>\n<p><a href=\"http:\/\/Livescience.com\">Livescience.com<\/a> | By LIVESCIENCE<\/p>\n<hr>\n<p>Sound has negative mass, and all around you it\u2019s drifting up, up and away \u2014 albeit very slowly.<\/p>\n<p>That\u2019s the conclusion of <a href=\"https:\/\/arxiv.org\/abs\/1807.08771\">a paper<\/a> submitted on July 23 to the preprint journal arXiv, and it shatters the conventional understanding that researchers have long had of <a href=\"https:\/\/www.livescience.com\/61512-tractor-beam-levitates-objects.html\">sound waves<\/a>: as massless ripples that zip through matter, giving molecules a shove but ultimately balancing any forward or upward motion with an equal and opposite downward motion. That\u2019s a straightforward model that will explain the behavior of sound in most circumstances, but it\u2019s not quite true, the new paper argues. [<a href=\"https:\/\/www.livescience.com\/26869-biggest-numbers-in-universe.html\">The Mysterious Physics of 7 Everyday Things<\/a>]<\/p>\n<p>A phonon \u2014 a particle-like unit of vibration that can describe sound at very small scales \u2014 has a very slight negative mass, and that means sound waves travel upward ever so slightly, said Rafael Krichevsky, a graduate student in physics at Columbia University.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Circa 2017 Livescience.com | By LIVESCIENCE Sound has negative mass, and all around you it\u2019s drifting up, up and away \u2014 albeit very slowly. That\u2019s the conclusion of a paper submitted on July 23 to the preprint journal arXiv, and it shatters the conventional understanding that researchers have long had of sound waves: as massless [\u2026]<\/p>\n","protected":false},"author":513,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"class_list":["post-127704","post","type-post","status-publish","format-standard","hentry","category-particle-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/127704","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/513"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=127704"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/127704\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=127704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=127704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=127704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}