{"id":227,"date":"2008-01-21T06:07:37","date_gmt":"2008-01-21T11:07:37","guid":{"rendered":"http:\/\/arxivblog.com\/?p=227"},"modified":"2008-01-21T06:10:49","modified_gmt":"2008-01-21T11:10:49","slug":"the-mysterious-volume-of-a-black-hole","status":"publish","type":"post","link":"https:\/\/arxivblog.com\/?p=227","title":{"rendered":"The mysterious volume of a black hole"},"content":{"rendered":"<p><a href=\"http:\/\/arxivblog.com\/wp-content\/uploads\/2008\/01\/volume-of-a-black-hole.jpg\" title=\"Volume of a black hole\"><img decoding=\"async\" src=\"http:\/\/arxivblog.com\/wp-content\/uploads\/2008\/01\/volume-of-a-black-hole.thumbnail.jpg\" alt=\"Volume of a black hole\" \/><\/a><\/p>\n<p align=\"left\">&nbsp;<\/p>\n<p align=\"left\">Work out the surface area of a non-spinning black hole and you&#8217;ll get the answer:<\/p>\n<p align=\"left\">&nbsp;<\/p>\n<p align=\"left\">&nbsp;<\/p>\n<p align=\"center\">16<span lang=\"EN-GB\">\u03c0(Gm\/c^2) \/c^2<\/span><\/p>\n<p align=\"left\">&nbsp;<\/p>\n<p align=\"left\">But ask what volume this surface contains and you&#8217;re in for a surprise.  Turns out that the volume depends on how the 3-space within the black hole is defined.  Now Brandon DiNunno and Richard Matzner from the University of Texas at Austin have performed the calculations for various definitions of 3-space and show how the volume of black hole can be time-dependent and even, in certain circumstances,  zero.<\/p>\n<p align=\"left\">Yep, that&#8217;s zero!<\/p>\n<p align=\"left\">Ref:  <a href=\"http:\/\/arxiv.org\/abs\/0801.1734\">arxiv.org\/abs\/0801.1734<\/a>: The Volume Inside a Black Hole<\/p>\n<p align=\"left\">&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Work out the surface area of a non-spinning black hole and you&#8217;ll get the answer: &nbsp; &nbsp; 16\u03c0(Gm\/c^2) \/c^2 &nbsp; But ask what volume this surface contains and you&#8217;re in for a surprise. Turns out that the volume depends on how the 3-space within the black hole is defined. Now Brandon DiNunno and Richard [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,5],"tags":[],"class_list":["post-227","post","type-post","status-publish","format-standard","hentry","category-calculatin","category-secrets"],"_links":{"self":[{"href":"https:\/\/arxivblog.com\/index.php?rest_route=\/wp\/v2\/posts\/227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arxivblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arxivblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arxivblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/arxivblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=227"}],"version-history":[{"count":0,"href":"https:\/\/arxivblog.com\/index.php?rest_route=\/wp\/v2\/posts\/227\/revisions"}],"wp:attachment":[{"href":"https:\/\/arxivblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arxivblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arxivblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}