{"id":9181,"date":"2011-07-09T05:12:50","date_gmt":"2011-07-09T10:12:50","guid":{"rendered":"http:\/\/blogs.scienceforums.net\/swansont\/?p=9181"},"modified":"2011-07-09T05:12:50","modified_gmt":"2011-07-09T10:12:50","slug":"science-with-soda-cans","status":"publish","type":"post","link":"http:\/\/blogs.scienceforums.net\/swansont\/archives\/9181","title":{"rendered":"More Science with Soda Cans"},"content":{"rendered":"<p>You can do more than <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/2066\">roll them down an inclined plane<\/a>.<\/p>\n<p><a href=\"http:\/\/www.nature.com\/news\/2011\/110708\/full\/news.2011.406.html\">Soft-drink cans beat the diffraction limit<\/a><\/p>\n<blockquote><p>The group generated audible sound from a ring of computer speakers surrounding the acoustic &#8216;lens&#8217;: a seven-by-seven array of empty soft-drink cans. Because air is free to move inside and around the cans, they oscillate together like joined-up organ pipes, generating a cacophony of resonance patterns. Crucially, many of the resonances emanate from the can openings, which are much smaller than the wavelength of the sound wave, and so have a similar nature to evanescent waves.<\/p>\n<p>To focus the sound, the trick is to capture these waves at any point on the array.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>You can do more than roll them down an inclined plane. Soft-drink cans beat the diffraction limit The group generated audible sound from a ring of computer speakers surrounding the acoustic &#8216;lens&#8217;: a seven-by-seven array of empty soft-drink cans. Because &hellip; <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/9181\">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],"tags":[],"class_list":["post-9181","post","type-post","status-publish","format-standard","hentry","category-physics"],"_links":{"self":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/9181","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=9181"}],"version-history":[{"count":0,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/9181\/revisions"}],"wp:attachment":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/media?parent=9181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/categories?post=9181"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/tags?post=9181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}