{"id":3022,"date":"2011-03-11T12:08:51","date_gmt":"2011-03-11T02:08:51","guid":{"rendered":"http:\/\/hifi-writer.com\/wpblog\/?p=3022"},"modified":"2011-03-11T08:29:43","modified_gmt":"2011-03-10T22:29:43","slug":"the-imaginary-world-of-colour","status":"publish","type":"post","link":"http:\/\/hifi-writer.com\/wpblog\/?p=3022","title":{"rendered":"The imaginary world of colour"},"content":{"rendered":"<p>Colour is a construct of the mind. Out in the real world what we perceive as colours is simply a small subset (less than an octave) of the wavelengths in the electromagnetic spectrum. Evolution has endowed us with a mechanism for distinguishing between these wavelengths, thus providing additional useful information about the world around us.<\/p>\n<p>I knew this already. What I didn&#8217;t know was that the three pigments in the colour-sensing cells in our retinas are consumed in the process of detecting the colours, and are continually replenished. I found this by watching some very informative videos on the <a title=\"The Oscars\" href=\"http:\/\/www.oscars.org\/index.html\">Oscars website<\/a>. Yes, as in movie Academy Awards. In particular, is has a number of pages dealing with its &#8216;<a title=\"Solid State Lighting Project website\" href=\"http:\/\/www.oscars.org\/science-technology\/council\/projects\/ssl\/index.html\">Solid State Lighting Project<\/a>&#8216;.<\/p>\n<p>On the right of this page is a section called &#8216;Symposium Videos&#8217;. These are each about five minutes. I recommend &#8216;Perception of Color&#8217;. This (towards the end) makes clear why this optical illusion works (look at the black + in the middle and wait):<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter\" title=\"Purple Circles optical illusion\" src=\"http:\/\/www.hifi-writer.com\/blog\/graphics\/purplecircles.gif\" alt=\"Purple Circles optical illusion\" width=\"467\" height=\"467\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Colour is a construct of the mind. Out in the real world what we perceive as colours is simply a small subset (less than an octave) of the wavelengths in the electromagnetic spectrum. Evolution has endowed us with a mechanism &hellip; <a href=\"http:\/\/hifi-writer.com\/wpblog\/?p=3022\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[47,5],"tags":[],"_links":{"self":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts\/3022"}],"collection":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3022"}],"version-history":[{"count":3,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts\/3022\/revisions"}],"predecessor-version":[{"id":3025,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts\/3022\/revisions\/3025"}],"wp:attachment":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3022"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3022"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3022"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}