{"id":12382,"date":"2012-09-14T03:00:48","date_gmt":"2012-09-14T08:00:48","guid":{"rendered":"http:\/\/blogs.scienceforums.net\/swansont\/?p=12382"},"modified":"2012-09-14T03:00:48","modified_gmt":"2012-09-14T08:00:48","slug":"after-this-we-hypnotize-the-drops","status":"publish","type":"post","link":"http:\/\/blogs.scienceforums.net\/swansont\/archives\/12382","title":{"rendered":"After This We Hypnotize the Drops"},"content":{"rendered":"<p><object class=\"embed\" width=\"425\" height=\"264\" type=\"application\/x-shockwave-flash\" \ndata=\"http:\/\/www.youtube.com\/v\/669AcEBpdsY?fs=1\"><param name=\"wmode\" value=\"transparent\" \/><param name=\"movie\" value=\"http:\/\/www.youtube.com\/v\/669AcEBpdsY?fs=1\" \/><em>You need to a flashplayer enabled browser to view this YouTube video<\/em><\/object><\/p>\n<p><a href=\"http:\/\/blogs.scientificamerican.com\/psi-vid\/2012\/09\/12\/acoustic-levitation-of-liquids-looks-like-magic\/\">Acoustic Levitation of Liquids Looks Like Magic<\/a><\/p>\n<p><a href=\"http:\/\/www.anl.gov\/articles\/no-magic-show-real-world-levitation-inspire-better-pharmaceuticals\">No magic show: Real-world levitation to inspire better pharmaceuticals<\/a><\/p>\n<blockquote><p>The acoustic levitator uses two small speakers to generate sound waves at frequencies slightly above the audible range \u2013 roughly 22 kilohertz. When the top and bottom speakers are precisely aligned, they create two sets of sound waves that perfectly interfere with each other, setting up a phenomenon known as a standing wave.<\/p><\/blockquote>\n<p>The speed of sound is about 340 m\/s, so a 22 kHz wave has a wavelength of about 1.5 cm; the nodes would thus be half that distance apart, but you wouldn&#8217;t have to fill every node.  Notice the effect at 0:30, where the standing wave is adjusted \u2014 you can see the drops move up and down, in tandem.<\/p>\n<p>This seems to be analogous to a dipole force trap in atomic physics.  If that&#8217;s so, you&#8217;d have a radial pressure gradient also giving confinement, which might account for the somewhat strange look to the speakers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You need to a flashplayer enabled browser to view this YouTube video Acoustic Levitation of Liquids Looks Like Magic No magic show: Real-world levitation to inspire better pharmaceuticals The acoustic levitator uses two small speakers to generate sound waves at &hellip; <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/12382\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,63],"tags":[],"class_list":["post-12382","post","type-post","status-publish","format-standard","hentry","category-physics","category-video"],"_links":{"self":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/12382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/comments?post=12382"}],"version-history":[{"count":0,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/12382\/revisions"}],"wp:attachment":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/media?parent=12382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/categories?post=12382"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/tags?post=12382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}