{"id":1209,"date":"2009-01-09T04:53:25","date_gmt":"2009-01-09T09:53:25","guid":{"rendered":"http:\/\/blogs.scienceforums.net\/swansont\/?p=1209"},"modified":"2009-01-09T04:53:25","modified_gmt":"2009-01-09T09:53:25","slug":"the-photon-push-me-pull-you-update","status":"publish","type":"post","link":"http:\/\/blogs.scienceforums.net\/swansont\/archives\/1209","title":{"rendered":"The Photon Push-Me Pull-You Update"},"content":{"rendered":"

Back in June I wrote up a post an the Abraham-Minkowski controversy<\/a>, which concerns the momentum of a photon when it’s in a medium.<\/p>\n

Depending on the assumptions one makes, one can show that the momentum increases or decreases inside the medium, and obviously both solutions can’t be correct. But for a long time it was unclear which assumptions were faulty, because it was such a delicate experiment to do.<\/p>\n

I just ran across a post at Everyday Scientist<\/a>, and the paper (based on the ArXiv preprint I cite in the link) was published last month \u2026 and there’s a video.<\/p>\n

Light Bends Glass<\/a><\/p>\n

The researchers performed a second experiment with a longer fiber and continuous–rather than pulsed–laser light and found similar results. The tip of the hanging fiber moved sideways like a pendulum by about 30 microns, which agreed with the tiny force (less than a billionth of a Newton) that they predicted. The team also verified that thermal effects, such as heat expansion, would be too small to influence the fiber’s movement.<\/p><\/blockquote>\n

You need to a flashplayer enabled browser to view this YouTube video<\/em><\/object><\/p>\n","protected":false},"excerpt":{"rendered":"

Back in June I wrote up a post an the Abraham-Minkowski controversy, which concerns the momentum of a photon when it’s in a medium. Depending on the assumptions one makes, one can show that the momentum increases or decreases inside … Continue reading →<\/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":[13,17,39,63],"tags":[324],"class_list":["post-1209","post","type-post","status-publish","format-standard","hentry","category-cool-stuff","category-experiments","category-physics","category-video","tag-minkowski-abraham-controversy"],"_links":{"self":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/1209","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=1209"}],"version-history":[{"count":0,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/1209\/revisions"}],"wp:attachment":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/media?parent=1209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/categories?post=1209"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/tags?post=1209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}