{"id":387517,"date":"2017-03-21T03:00:00","date_gmt":"2017-03-21T00:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=830e245cdf20b2cab92b5b45b7b1455b"},"modified":"2017-03-21T03:00:00","modified_gmt":"2017-03-21T00:00:00","slug":"a-circumzenithal-arc-to-study-optics-concepts-with-geometrical-optics","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=387517","title":{"rendered":"A circumzenithal arc to study optics concepts with geometrical optics"},"content":{"rendered":"<p>This paper describes the formation of a circumzenithal arc for the purpose of teaching light and<br \/>\noptics. A circumzenithal arc, an optic formation rarely witnessed by people, is formed in this study<br \/>\nusing a water-filled cylindrical glass illuminated by sunlight. Sunlight refracted at the top and<br \/>\nside surfaces of the glass of water is dispersed into its constituent colours. First, multi-colour<br \/>\narcs are observed on paper at the bottom of the glass. Then, a single arc for each colour is<br \/>\nobserved on the floor when the rays are allowed to propagate to the furthest points from the glass.<br \/>\nThe change in observations is explained by formulating an equation for the geometry of the<br \/>\nsituation. The formula relates each point on the first refracting surface for an incoming light ray<br \/>\nto a point further from the second refracting surface. Then, a parallel graph is drawn to visualize<br \/>\nthe superposition of colours to the formation of a single arc. The geometrical optics studies in<br \/>\nthis paper exempl&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This paper describes the formation of a circumzenithal arc for the purpose of teaching light and<br \/>\noptics. A circumzenithal arc, an optic formation rarely witnessed by people, is formed in this study<br \/>\nusing a water-filled cylindrical glass illuminated b&#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-387517","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\/387517","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=387517"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/387517\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=387517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=387517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=387517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}