{"id":343954,"date":"2016-12-22T03:00:00","date_gmt":"2016-12-22T00:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=c95a6ef2c31d42c5c8ee114692915b54"},"modified":"2016-12-22T03:00:00","modified_gmt":"2016-12-22T00:00:00","slug":"an-undergraduate-laboratory-experiment-for-measuring-%ce%b5-0-%ce%bc-0-and-speed-of-light-c-withdo-it-yourself-catastrophe-machines-electrostatic-and-magnetostatic-pendula","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=343954","title":{"rendered":"An undergraduate laboratory experiment for measuring \u03b5 0 , \u03bc 0 and speed of light c with\r\ndo-it-yourself catastrophe machines: electrostatic and magnetostatic pendula"},"content":{"rendered":"<p>An experimental set-up for electrostatic measurement of ##IMG##<br \/>\n[http:\/\/ej.iop.org\/images\/0143-0807\/38\/2\/025203\/ejpaa50c7ieqn1.gif] {${\\varepsilon }_{0}$} ,<br \/>\nseparate magnetostatic measurement of ##IMG##<br \/>\n[http:\/\/ej.iop.org\/images\/0143-0807\/38\/2\/025203\/ejpaa50c7ieqn2.gif] {${\\mu }_{0}$} and determination<br \/>\nof the speed of light ##IMG## [http:\/\/ej.iop.org\/images\/0143-0807\/38\/2\/025203\/ejpaa50c7ieqn3.gif]<br \/>\n{$c=1\/\\sqrt{{\\varepsilon }_{0}{\\mu }_{0}}$} according to Maxwell\u2019s theory with percent accuracy is<br \/>\ndescribed. No forces are measured with the experimental set-up, therefore there is no need for a<br \/>\nscale, and the experiment cost of less than \u00a320 is mainly due to the batteries used. Multiplied<br \/>\n137\u00a0times, this experimental set-up was given at the Fourth Open International Experimental Physics<br \/>\nOlympiad (EPO4) and a dozen high school students performed successful experiments. The experimental<br \/>\nset-up actually contains two diffe&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An experimental set-up for electrostatic measurement of ##IMG##<br \/>\n[http:\/\/ej.iop.org\/images\/0143-0807\/38\/2\/025203\/ejpaa50c7ieqn1.gif] {${\\varepsilon }_{0}$} ,<br \/>\nseparate magnetostatic measurement of ##IMG##<br \/>\n[http:\/\/ej.iop.org\/images\/0143-0807\/38\/2\/02520&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-343954","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/343954","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=343954"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/343954\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=343954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=343954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=343954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}