{"id":10747,"date":"2011-07-26T10:52:29","date_gmt":"2011-07-26T15:52:29","guid":{"rendered":"http:\/\/fraynelson.com\/blog\/2011\/07\/26\/bbc-news-time-travel-light-speed-results-cast-fresh-doubts\/"},"modified":"2011-07-26T10:52:29","modified_gmt":"2011-07-26T15:52:29","slug":"bbc-news-time-travel-light-speed-results-cast-fresh-doubts","status":"publish","type":"post","link":"https:\/\/fraynelson.com\/blog\/2011\/07\/26\/bbc-news-time-travel-light-speed-results-cast-fresh-doubts\/","title":{"rendered":"BBC News – Time travel: Light speed results cast fresh doubts"},"content":{"rendered":"
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Now, Shengwang Du and colleagues at the Hong Kong University of Science and Technology have measured what is known as an optical precursor.<\/p>\n

Like the wind that moves ahead of a speeding train, optical precursors are the waves that precede photons in a material; before now, such optical precursors have never been directly observed for single photons.<\/p>\n

By passing pairs of photons through a vapour of atoms held at just 100 millionths of a degree above absolute zero – the Universe’s ultimate low-temperature limit – the team showed that the optical precursor and the photon that caused it are indeed limited to the vacuum speed of light.<\/p>\n

“By showing that single photons cannot travel faster than the speed of light, our results bring a closure to the debate on the true speed of information carried by a single photon,” said Professor Du.<\/p>\n

Thus, photons cannot time travel, and moving information around at faster-than-light speeds is impossible.<\/p>\n<\/blockquote>\n

via bbc.co.uk<\/a><\/div>\n<\/p>\n<\/div>\n

Publicado via email<\/a> a partir de Palabras de camino<\/a> <\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Now, Shengwang Du and colleagues at the Hong Kong University of Science and Technology have measured what is known as an optical precursor. Like the wind that moves ahead of a speeding train, optical precursors are the waves that precede photons in a material; before now, such optical precursors have never been directly observed for … <\/p>\n

Continuar leyendo “BBC News – Time travel: Light speed results cast fresh doubts”<\/span><\/a><\/p>\n","protected":false},"author":1138,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"class_list":["post-10747","post","type-post","status-publish","format-standard","hentry","category-ciencia-y-tecnologia"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/posts\/10747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/users\/1138"}],"replies":[{"embeddable":true,"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/comments?post=10747"}],"version-history":[{"count":0,"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/posts\/10747\/revisions"}],"wp:attachment":[{"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/media?parent=10747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/categories?post=10747"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fraynelson.com\/blog\/wp-json\/wp\/v2\/tags?post=10747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}