{"id":608061,"date":"2017-10-24T02:00:00","date_gmt":"2017-10-23T23:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=6e1a6d7af2302d152823abf5e4e96681"},"modified":"2017-10-24T02:00:00","modified_gmt":"2017-10-23T23:00:00","slug":"why-do-aged-fluorescent-tubes-flicker","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=608061","title":{"rendered":"Why do aged fluorescent tubes flicker?"},"content":{"rendered":"<p>Our everyday experience of aged and defective fluorescent tubes or bulbs informs us that they may<br \/>\nflicker and emit a clicking sound while struggling to light up. In this article, the physical<br \/>\nmechanisms controlling the initial illumination of a functioning fluorescent tube are investigated<br \/>\nusing a simple and affordable experimental setup. Thermionic emission from the electrodes of the<br \/>\ntube controls the startup of fluorescent tubes. The origin of the faulty startup of aged fluorescent<br \/>\ntubes is discussed and flickering regimes using functional tubes are artificially produced using a<br \/>\ndedicated setup that decreases electron emission by the thermionic effect in a controlled manner.<br \/>\nThe physical parameters controlling the occurrence of flickering light are discussed, and their<br \/>\ntemporal statistics are reported.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Our everyday experience of aged and defective fluorescent tubes or bulbs informs us that they may<br \/>\nflicker and emit a clicking sound while struggling to light up. In this article, the physical<br \/>\nmechanisms controlling the initial illumination of a funct&#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-608061","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\/608061","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=608061"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/608061\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=608061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=608061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=608061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}