{"id":13165,"date":"2013-02-16T09:33:15","date_gmt":"2013-02-16T14:33:15","guid":{"rendered":"http:\/\/blogs.scienceforums.net\/swansont\/?p=13165"},"modified":"2013-02-16T09:33:15","modified_gmt":"2013-02-16T14:33:15","slug":"the-mystery-of-magenta-and-of-light-mixing","status":"publish","type":"post","link":"http:\/\/blogs.scienceforums.net\/swansont\/archives\/13165","title":{"rendered":"The Mystery of Magenta, and of Light Mixing"},"content":{"rendered":"<p><object class=\"embed\" width=\"425\" height=\"264\" type=\"application\/x-shockwave-flash\" \ndata=\"http:\/\/www.youtube.com\/v\/iPPYGJjKVco?fs=1\"><param name=\"wmode\" value=\"transparent\" \/><param name=\"movie\" value=\"http:\/\/www.youtube.com\/v\/iPPYGJjKVco?fs=1\" \/><em>You need to a flashplayer enabled browser to view this YouTube video<\/em><\/object><\/p>\n<p>Interesting and fun, but about 35 seconds in he says that you can&#8217;t combine photons together, and that&#8217;s just plain wrong.<\/p>\n<blockquote><p>I know that you can&#8217;t mix photons together. So you can&#8217;t take a blue photon and a green photon and mix them together to get some other photon. That just doesn&#8217;t happen.<\/p><\/blockquote>\n<p>Except that it does. You have to do this in a nonlinear medium like certain crystals, but it can be done. It&#8217;s called sum frequency generation.<br \/>\n<a href=\"http:\/\/blogs.scienceforums.net\/swansont\/files\/2013\/02\/sum-frequency.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/blogs.scienceforums.net\/swansont\/files\/2013\/02\/sum-frequency.png\" alt=\"\" width=\"431\" height=\"334\" class=\"alignright size-full wp-image-13176\" srcset=\"http:\/\/blogs.scienceforums.net\/swansont\/wp-content\/uploads\/sites\/4\/2013\/02\/sum-frequency.png 431w, http:\/\/blogs.scienceforums.net\/swansont\/wp-content\/uploads\/sites\/4\/2013\/02\/sum-frequency-300x232.png 300w\" sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/a><\/p>\n<p>Energy is conserved, so in the example given a 2.5 eV (green) photon added to a 3 eV (blue) photon will result in a 5.5 eV photon, which will be ultraviolet. The addition is not what we see with our eyes, since that&#8217;s a different process.<\/p>\n<p>A special case of this is where the two photons being added are the same frequency. This is called frequency doubling, and a common (amongst geeks, at least) example of this is a green laser pointer.  The source inside of this is actually an infrared laser emitting at 1064 nm, which then passes through a doubling crystal to produce light at twice the frequency, or half the wavelength: 532 nm. (and cheap laser pointers may not filter the IR from the output, which can be a danger) <\/p>\n","protected":false},"excerpt":{"rendered":"<p>You need to a flashplayer enabled browser to view this YouTube video Interesting and fun, but about 35 seconds in he says that you can&#8217;t combine photons together, and that&#8217;s just plain wrong. I know that you can&#8217;t mix photons &hellip; <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/13165\">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":[35,39,63],"tags":[],"class_list":["post-13165","post","type-post","status-publish","format-standard","hentry","category-other-science","category-physics","category-video"],"_links":{"self":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/13165","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=13165"}],"version-history":[{"count":0,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/13165\/revisions"}],"wp:attachment":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/media?parent=13165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/categories?post=13165"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/tags?post=13165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}