{"id":481,"date":"2017-02-14T11:18:22","date_gmt":"2017-02-14T11:18:22","guid":{"rendered":"https:\/\/blogs.ncl.ac.uk\/stem\/?p=481"},"modified":"2018-01-04T13:57:46","modified_gmt":"2018-01-04T13:57:46","slug":"trythistuesday-valentines-day-optical-illusion","status":"publish","type":"post","link":"https:\/\/blogs.ncl.ac.uk\/stem\/2017\/02\/14\/trythistuesday-valentines-day-optical-illusion\/","title":{"rendered":"#TryThisTuesday: Valentine&#8217;s Day Optical Illusion"},"content":{"rendered":"<p>Happy Valentine&#8217;s Day!\u00a0Love can confuse your brain, and so does this week&#8217;s Try This Tuesday.<\/p>\n<p>You don\u2019t need any equipment to try this experiment at home \u2013 you just need to stare at your screen, or more specifically the + in the middle of the picture below. You can blink but don&#8217;t look away.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-490 aligncenter\" src=\"https:\/\/blogs.ncl.ac.uk\/stem\/files\/2017\/02\/heart-optical-illusion.png\" alt=\"heart-optical-illusion\" width=\"668\" height=\"418\" srcset=\"https:\/\/blogs.ncl.ac.uk\/stem\/files\/2017\/02\/heart-optical-illusion.png 1680w, https:\/\/blogs.ncl.ac.uk\/stem\/files\/2017\/02\/heart-optical-illusion-300x188.png 300w, https:\/\/blogs.ncl.ac.uk\/stem\/files\/2017\/02\/heart-optical-illusion-768x480.png 768w, https:\/\/blogs.ncl.ac.uk\/stem\/files\/2017\/02\/heart-optical-illusion-1024x640.png 1024w\" sizes=\"auto, (max-width: 668px) 100vw, 668px\" \/><\/p>\n<p>If you stare long enough the pink dots should disappear!<\/p>\n<h3>The Science<\/h3>\n<p>It looks like the pink dots have disappeared due to a\u00a0visual phenomenon called Troxler\u2019s fading or Troxler\u2019s effect. if you fix your eyes on a certain point, then anything in your peripheral vision will fade away and disappear after about 20 seconds. In this experiment our sight was focused on the + in the middle of the screen and the\u00a0the pink dots in your periphery slowly fade and finally disappear. It works especially well in this experiment at there is such low contrast\u00a0between the light pink dots and the grey background.<\/p>\n<p>This is a type of optical illusion. If you want to see another, have a look at our spinning disk Try This Tuesday.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Happy Valentine&#8217;s Day!\u00a0Love can confuse your brain, and so does this week&#8217;s Try This Tuesday. You don\u2019t need any equipment to try this experiment at home \u2013 you just need to stare at your screen, or more specifically the + in the middle of the picture below. You can blink but don&#8217;t look away. If &hellip; <a href=\"https:\/\/blogs.ncl.ac.uk\/stem\/2017\/02\/14\/trythistuesday-valentines-day-optical-illusion\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">#TryThisTuesday: Valentine&#8217;s Day Optical Illusion<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2139,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[99,22,117,177,58,46,120,38,29,21,45],"class_list":["post-481","post","type-post","status-publish","format-standard","hentry","category-try-this-tuesday","tag-brain","tag-challenge","tag-experiment","tag-optical-illusion","tag-psychology","tag-sight","tag-stem","tag-try-this-at-home","tag-try-this-tuesday","tag-trythistuesday","tag-vision"],"_links":{"self":[{"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/posts\/481","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/users\/2139"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/comments?post=481"}],"version-history":[{"count":3,"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/posts\/481\/revisions"}],"predecessor-version":[{"id":492,"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/posts\/481\/revisions\/492"}],"wp:attachment":[{"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/media?parent=481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/categories?post=481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/stem\/wp-json\/wp\/v2\/tags?post=481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}