{"id":2290,"date":"2013-04-01T14:35:57","date_gmt":"2013-04-01T13:35:57","guid":{"rendered":"http:\/\/t-machine.org\/?p=2290"},"modified":"2013-04-01T14:35:57","modified_gmt":"2013-04-01T13:35:57","slug":"round-earth-flat-earth-impossible-to-tell","status":"publish","type":"post","link":"http:\/\/new.t-machine.org\/index.php\/2013\/04\/01\/round-earth-flat-earth-impossible-to-tell\/","title":{"rendered":"Round Earth? Flat Earth? Impossible to tell?"},"content":{"rendered":"<p><a href=\"https:\/\/en.wikipedia.org\/wiki\/Bedford_Level_Experiment\">https:\/\/en.wikipedia.org\/wiki\/Bedford_Level_Experiment<\/a><\/p>\n<p>(unsubstantiated, but hilarious): &#8220;If the measurement is close enough to the surface, light rays can curve downward at a rate equal to the mean curvature of the Earth&#8217;s surface. In this case, the two effects of curvature and refraction cancel each other out and the Earth will appear flat in optical experiments.&#8221;<\/p>\n<blockquote><p>\n&#8230;&#8221;an increase in air temperature &#8230; of 0.11 degrees Celsius per metre of altitude would create an illusion of a flat canal, &#8230; [or if] higher than this &#8230; all optical observations would be consistent with a concave surface, a &#8220;bowl-shaped earth&#8221;&#8221;<\/p>\n<p>&#8230;&#8221;Ulysses Grant Morrow, &#8230; found that his target marker, eighteen inches above water level and five miles distant, was clearly visible he concluded that the Earth&#8217;s surface was concavely curved&#8221;\n<\/p><\/blockquote>\n<p>(the history of maps and globe representations of the Earth is full of wonderful things like this)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/en.wikipedia.org\/wiki\/Bedford_Level_Experiment (unsubstantiated, but hilarious): &#8220;If the measurement is close enough to the surface, light rays can curve downward at a rate equal to the mean curvature of the Earth&#8217;s surface. In this case, the two effects of curvature and refraction cancel each other out and the Earth will appear flat in optical experiments.&#8221; &#8230;&#8221;an increase [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,9],"tags":[],"_links":{"self":[{"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/posts\/2290"}],"collection":[{"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/comments?post=2290"}],"version-history":[{"count":1,"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/posts\/2290\/revisions"}],"predecessor-version":[{"id":2291,"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/posts\/2290\/revisions\/2291"}],"wp:attachment":[{"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/media?parent=2290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/categories?post=2290"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/new.t-machine.org\/index.php\/wp-json\/wp\/v2\/tags?post=2290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}