{"id":3312,"date":"2011-08-03T11:04:28","date_gmt":"2011-08-03T11:04:28","guid":{"rendered":"http:\/\/t2k-experiment.org\/wp-content\/uploads\/Cherenkov.png"},"modified":"2021-05-11T11:32:50","modified_gmt":"2021-05-11T11:32:50","slug":"cherenkov-2","status":"inherit","type":"attachment","link":"https:\/\/t2k-experiment.org\/ja\/about-neutrinos\/%e3%83%8b%e3%83%a5%e3%83%bc%e3%83%88%e3%83%aa%e3%83%8e%e7%99%ba%e7%94%9f%e6%ba%90\/cherenkov-2\/","title":{"rendered":"Cherenkov"},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"nf_dc_page":""},"class_list":["post-3312","attachment","type-attachment","status-inherit","hentry"],"description":{"rendered":"<p class=\"attachment\"><a href='https:\/\/t2k-experiment.org\/wp-content\/uploads\/Cherenkov.png'><img decoding=\"async\" loading=\"lazy\" width=\"200\" height=\"186\" src=\"https:\/\/t2k-experiment.org\/wp-content\/uploads\/Cherenkov.png\" class=\"attachment-medium size-medium\" alt=\"\" \/><\/a><\/p>\n<p>Diagram and description of Cherenkov radiation<\/p>\n"},"caption":{"rendered":"<p>Figure 7: the geometry of Cherenkov radiation. The particle is travelling left to right at speed \u03b2c through a medium with refractive index n.  The Cherenkov cone has half-angle \u03b8 given by cos \u03b8 = 1\/n\u03b2.  In many cases, the particles can be treated as extremely relativistic, \u03b2 \u223c 1: in this case the opening angle depends only on the medium, cos \u03b8 = 1\/n.  Figure from  Wikimedia Commons<\/p>\n"},"alt_text":"","media_type":"image","mime_type":"image\/png","media_details":{"width":"200","height":"186","hwstring_small":"height='96' width='103'","file":"Cherenkov.png","sizes":{"thumbnail":{"file":"Cherenkov-100x100.png","width":"100","height":"100","source_url":"https:\/\/t2k-experiment.org\/wp-content\/uploads\/Cherenkov-100x100.png"},"full":{"file":"Cherenkov.png","width":200,"height":186,"mime_type":"image\/png","source_url":"https:\/\/t2k-experiment.org\/wp-content\/uploads\/Cherenkov.png"}},"image_meta":{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}},"post":3602,"source_url":"https:\/\/t2k-experiment.org\/wp-content\/uploads\/Cherenkov.png","_links":{"self":[{"href":"https:\/\/t2k-experiment.org\/ja\/wp-json\/wp\/v2\/media\/3312","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/t2k-experiment.org\/ja\/wp-json\/wp\/v2\/media"}],"about":[{"href":"https:\/\/t2k-experiment.org\/ja\/wp-json\/wp\/v2\/types\/attachment"}],"author":[{"embeddable":true,"href":"https:\/\/t2k-experiment.org\/ja\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/t2k-experiment.org\/ja\/wp-json\/wp\/v2\/comments?post=3312"}],"wp:attached-to":[{"embeddable":true,"post_type":"page","id":3602,"href":"https:\/\/t2k-experiment.org\/ja\/wp-json\/wp\/v2\/pages\/3602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}