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define('DISALLOW_FILE_MODS', true);{"id":267,"date":"2009-01-16T12:47:06","date_gmt":"2009-01-16T20:47:06","guid":{"rendered":"http:\/\/www.superchargedsciencefairprojects.com\/?p=267"},"modified":"2009-01-19T10:55:22","modified_gmt":"2009-01-19T18:55:22","slug":"measuring-the-speed-of-light","status":"publish","type":"post","link":"http:\/\/www.superchargedsciencefairprojects.com\/?p=267","title":{"rendered":"Measuring the Speed of Light"},"content":{"rendered":"<p>So this is a more advanced project&#8230; and one that takes <em>patience<\/em>.\u00c2\u00a0 There is an easy way and a hard way to do this project.\u00c2\u00a0 I particularly <em>like <\/em>the hard way better, because there&#8217;s more observational science involved and less mathematics.\u00c2\u00a0 But let&#8217;s start with the easy way first.<\/p>\n<p><strong>Easy Method for Measuring the Speed of Light <\/strong>In a transparent tupperware, make a batch of clear gelatin (like jell-o) and let it harden.\u00c2\u00a0 Skimp on the water so the mixture is very firm.\u00c2\u00a0 When ready, take it out of the fridge and shine a laser beam through the side of the tupperware&#8230; you&#8217;ll see the beam &#8216;bend&#8217;.\u00c2\u00a0 Carefully measure the angles of incidence and refraction and use Snell&#8217;s law to back-calculate the speed of light.<\/p>\n<p>For reference, the index of refraction for ice is 1.31; for water at 20 deg. C is 1.33; for diamond it&#8217;s 2.42; for plexiglass it&#8217;s 1.51.\u00c2\u00a0 For your measurement to be completely accurate, you&#8217;ll need to remove the tupperware and measure it for the gelatin.<\/p>\n<p>&#8230;to be continued&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>So this is a more advanced project&#8230; and one that takes patience.\u00c2\u00a0 There is an easy way and a hard way to do this project.\u00c2\u00a0 I particularly like the hard way better, because there&#8217;s more observational science involved and less mathematics.\u00c2\u00a0 But let&#8217;s start with the easy way first. Easy Method for Measuring the Speed [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-267","post","type-post","status-publish","format-standard","hentry","category-science-fair-project-tips-tricks"],"_links":{"self":[{"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=\/wp\/v2\/posts\/267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=267"}],"version-history":[{"count":5,"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=\/wp\/v2\/posts\/267\/revisions"}],"predecessor-version":[{"id":284,"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=\/wp\/v2\/posts\/267\/revisions\/284"}],"wp:attachment":[{"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=267"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.superchargedsciencefairprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}