{"id":104611,"date":"2015-07-15T03:00:00","date_gmt":"2015-07-15T00:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=be84e505da96264f6d97c556c1c8fa6d"},"modified":"2015-07-15T03:00:00","modified_gmt":"2015-07-15T00:00:00","slug":"measuring-the-hydrogen-balmer-series-and-rydbergs-constant-with-a-homemade-spectrophotometer-2","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=104611","title":{"rendered":"Measuring the hydrogen Balmer series and Rydberg?s constant with a homemade spectrophotometer"},"content":{"rendered":"<p>In a recent paper (Amrani 2014 Eur. J. Phys. 35 [http:\/\/dx.doi.org\/10.1088\/0143-0807\/35\/4\/045001]<br \/>\n045001 ), the author presented two different methods to measure the wavelength of visible lines of<br \/>\nBalmer series from the hydrogen atomic spectrum and estimate the value of Rydberg?s constant with an<br \/>\nerror difference of a few tenths of a per cent. Here we discuss how low cost spectrometers, based on<br \/>\nthe use of either transmission or reflection diffraction gratings coupled with a commercial digital<br \/>\ncamera, can be employed with the same aim. The Rydberg?s constant values obtained with our<br \/>\nspectrometers are R?=?1.096???0.007???10 7 m ?1 for the transmission grating spectrometer and R<br \/>\n?=?1.094???0.005???10 7 m ?1 for the reflection spectrometer, with a difference of less than 0.30%<br \/>\nfrom the accepted value of 1.097 373???10 7 m ?1 .<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In a recent paper (Amrani 2014 Eur. J. Phys. 35 [http:\/\/dx.doi.org\/10.1088\/0143-0807\/35\/4\/045001]<br \/>\n045001 ), the author presented two different methods to measure the wavelength of visible lines of<br \/>\nBalmer series from the hydrogen atomic spectrum and e&#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-104611","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\/104611","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=104611"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/104611\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=104611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=104611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=104611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}